100 Days of Deception Korean Drama 2026 Wiki: Cast, Story, Episodes, Characters & More
100 Days of Deception is an upcoming South Korean historical spy-romance drama starring Kim You-jung, Park Jin-young, Kim Hyun-joo, Lee Moo-saeng, and Jin Sun-kyu. The drama is set in 1932 Gyeongseong during the Japanese occupation of Korea and follows a talented pickpocket who is recruited to become an undercover spy.
Instead of focusing only on romance, the series combines espionage, action, historical drama, hidden identities, political tension, and emotional relationships. At the center of the story is Lee Ga-kyeong, a skilled pickpocket who enters the Japanese Government-General of Korea under a false identity. Her mission is supposed to last 100 days, but everything becomes more complicated when she encounters elite interpreter Kim Tae-woong, also known as Sato Hideo.
The drama is directed by Yoo In-shik, known for Dr. Romantic and Extraordinary Attorney Woo, and written by Ryu Bo-ri. It is scheduled to premiere on October 10, 2026, on tvN and will also be available internationally through Netflix.
100 Days of Deception Quick Details
| Information | Details |
|---|---|
| Drama Title | 100 Days of Deception |
| Korean Title | 100일의 거짓말 |
| Also Known As | 100 Days of Lies |
| Country | South Korea |
| Language | Korean |
| Genre | Historical, Spy, Romance, Action, Thriller |
| Setting | 1932 Gyeongseong |
| Network | tvN |
| International Streaming | Netflix |
| Premiere Date | October 10, 2026 |
| Episodes | 16 |
| Main Cast | Kim You-jung, Park Jin-young, Kim Hyun-joo, Lee Moo-saeng, Jin Sun-kyu |
| Director | Yoo In-shik |
| Writer | Ryu Bo-ri |
| Production Companies | Studio Dragon, Nangman Crew |
The drama is planned as a 16-episode weekend series, with episodes airing on Saturdays and Sundays. CJ ENM’s 2026 lineup and recent Korean media reports list the broadcast period as October 10 through November 29, 2026.
100 Days of Deception Release Date
100 Days of Deception premieres on October 10, 2026.
The series is scheduled to air on tvN every Saturday and Sunday. International viewers can also watch the drama through Netflix, where it is being released as part of Netflix’s Korean drama lineup.
The planned Korean broadcast time is around 9:10 PM KST.
What Is 100 Days of Deception About?
The story takes place in 1932 Gyeongseong, during the Japanese occupation of Korea.
Lee Ga-kyeong, played by Kim You-jung, is known as one of the most talented pickpockets in Gyeongseong. She is clever, quick, street-smart, and highly skilled at surviving difficult situations.
Ga-kyeong dreams of leaving Korea and starting a new life in America. She has been saving money for that future, but her plans change when she receives an unexpected offer from an anti-Japanese resistance organization.
She is asked to become an undercover spy.
Her mission is to infiltrate the Japanese Government-General of Korea by pretending to be an interpreter trainee. She accepts the dangerous assignment and enters an environment where one mistake could expose her true identity.
Her mission is supposed to last 100 days.
Inside the Government-General, Ga-kyeong encounters Kim Tae-woong, an elite interpreter who is also known by the Japanese name Sato Hideo. He is the adopted son of Sato Shinichi, a powerful Japanese official.
Tae-woong is intelligent, multilingual, and deeply connected to the organization Ga-kyeong is secretly working against.
This creates the central conflict of the drama.
Ga-kyeong must hide her identity while working inside the enemy’s organization, but the closer she gets to Tae-woong, the more difficult it becomes to separate her mission from her personal feelings.
Lee Ga-kyeong – Kim You-jung
Kim You-jung plays Lee Ga-kyeong, the main protagonist of the series.
Ga-kyeong is a highly skilled pickpocket who knows how to read people and escape dangerous situations. Her original goal is not to become a revolutionary or spy. She simply wants enough money to escape her difficult circumstances and build a different life.
That changes when she receives the opportunity to work for the independence movement.
She eventually disguises herself as an interpreter trainee and enters the Japanese Government-General.
Her greatest strength is her ability to think quickly. However, her undercover identity also becomes her greatest weakness because she must constantly maintain a lie.
Ga-kyeong’s journey is expected to explore how an individual who initially dreams about personal freedom gradually becomes involved in something much larger than herself.
Kim Tae-woong / Sato Hideo – Park Jin-young
Park Jin-young plays Kim Tae-woong, who uses the Japanese name Sato Hideo.
Tae-woong is an elite interpreter working for the Japanese Government-General. He is fluent in Korean, Japanese, and English, which makes him particularly valuable inside the organization.
He is also the adopted son of Sato Shinichi, an influential official.
Tae-woong initially appears to stand on the opposite side of Ga-kyeong’s mission. He works inside the very organization she has infiltrated, while she is secretly gathering information for the resistance.
Their relationship therefore begins with uncertainty and hidden motives.
Ga-kyeong cannot tell him who she really is, while Tae-woong may have reasons of his own for keeping parts of his identity hidden.
Yoo So-ran – Kim Hyun-joo
Kim Hyun-joo plays Yoo So-ran, a sniper associated with the anti-Japanese organization Gugukdan.
So-ran is the person who gives Ga-kyeong the opportunity to become a spy.
Unlike Ga-kyeong, who initially dreams about escaping to America, So-ran is directly involved in the resistance movement.
Her character adds another layer to the story because she represents the organized side of the independence struggle while Ga-kyeong enters that world from a very different background.
Yoo Philip – Lee Moo-saeng
Lee Moo-saeng plays Yoo Philip.
Philip is a Korean-American correspondent working in Korea for a U.S. news organization.
His position gives him access to information and people outside the immediate world of the Japanese Government-General.
His character is connected to the resistance storyline and adds an international perspective to the drama.
Sato Shinichi – Jin Sun-kyu
Jin Sun-kyu plays Sato Shinichi, an important Japanese official.
Shinichi is connected to the Government-General and is also the adoptive father of Kim Tae-woong/Sato Hideo.
His position makes him one of the powerful figures surrounding the central characters.
The connection between Shinichi and Tae-woong is particularly important because Ga-kyeong’s mission takes her directly into a world controlled by people like him.
Other Cast Members
The supporting cast includes several actors who help build the political, spy, and historical world of the series.
Reported supporting roles include:
- Choi Deok-moon as Kwak Woon-hak
- Seo Jung-yeon as Ryu Kwan-shil
- Kim Joong-hee as Fukuda
- Lee Ki-young as Kim Seung-eok
- Park Jung-yeon as Kim Myeong-nam
- Kim Do-hyun as Suzuki
- Lee Sun as Lee Young-bok
The ensemble gives the series a wider network of characters surrounding Ga-kyeong, Tae-woong, the resistance movement, and the Japanese administration.
The 100-Day Spy Mission
The title 100 Days of Deception is directly connected to the central mission.
Ga-kyeong enters the Japanese Government-General with a false identity and is expected to operate undercover for 100 days.
This creates a built-in time limit for the story.
Every day brings another possibility that her identity could be discovered.
A small mistake, an unexpected question, or a person recognizing something from her past could put the entire operation in danger.
The 100-day structure also gives the romance an interesting complication because Ga-kyeong cannot simply walk away from her feelings once the mission begins.
The Romance Between Ga-kyeong and Tae-woong
Romance is one of the major elements of the drama.
Ga-kyeong and Tae-woong begin from completely different positions.
She is secretly working for the resistance.
He is an elite interpreter working within the Japanese colonial administration.
Their first relationship is therefore built around uncertainty and suspicion.
The fact that Ga-kyeong is hiding her true identity makes every interaction between them more complicated.
The drama is expected to explore whether love can survive when two people are surrounded by secrets and political conflict.
The Importance of Translation
One of the most interesting elements of 100 Days of Deception is its use of interpretation and language.
Tae-woong works as an interpreter, meaning his job is to translate words between different languages and people.
But the drama uses this profession as more than just a workplace detail.
In a story filled with spies, hidden identities, and lies, understanding what someone truly means becomes extremely important.
A sentence can have one meaning on the surface and another hidden meaning underneath.
This makes communication itself part of the suspense.
The Historical Setting
The drama is set in 1932 Gyeongseong, during the Japanese occupation of Korea.
The period setting allows the series to explore a society shaped by political control, resistance movements, inequality, fear, and uncertainty.
The production team has also discussed the challenge of recreating the historical environment because many locations and buildings from that period no longer remain.
Director Yoo In-shik said that historical accuracy and recreating the period were significant production challenges, but the team worked to represent the era carefully.
Independence Movement Storyline
The independence movement is an important part of the drama’s story.
Ga-kyeong is not introduced as a conventional revolutionary. She begins as a pickpocket with personal dreams.
Her involvement with the resistance changes the direction of her life.
Through her undercover mission, the drama can show how ordinary people could become involved in larger historical events.
The story also places characters with very different motivations together, allowing the drama to explore the difference between personal survival and collective responsibility.
Action and Spy Elements
Although romance is central to the story, 100 Days of Deception is also a spy thriller.
Ga-kyeong’s work requires secrecy, observation, deception, and quick decisions.
The danger comes from the fact that she is operating inside an organization where discovery could have serious consequences.
The drama’s trailers and promotional material have emphasized hidden motives and characters who are not necessarily showing their true intentions.
100 Days of Deception Episode Guide
The drama is planned for 16 episodes.
Because the series has not premiered yet, detailed episode plots should not be treated as confirmed. The following guide gives the planned broadcast schedule without inventing spoilers.
Episode 1
Release Date: October 10, 2026
The opening episode introduces 1932 Gyeongseong, Lee Ga-kyeong, the resistance organization, and Kim Tae-woong. Ga-kyeong’s dangerous undercover mission begins.
Episode 2
Release Date: October 11, 2026
The story continues to establish Ga-kyeong’s position inside the Government-General and her complicated connection with Tae-woong.
Episode 3
Release Date: October 17, 2026
The undercover operation begins to create new challenges as Ga-kyeong has to maintain her false identity.
Episode 4
Release Date: October 18, 2026
The tension between the characters grows as secrets and conflicting loyalties become increasingly important.
Episode 5
Release Date: October 24, 2026
Ga-kyeong’s mission continues while her personal relationships become more complicated.
Episode 6
Release Date: October 25, 2026
The spy storyline develops further as the characters face new risks.
Episode 7
Release Date: October 31, 2026
The pressure surrounding Ga-kyeong’s undercover identity continues to increase.
Episode 8
Release Date: November 1, 2026
The central characters become more deeply connected as the mission progresses.
Episode 9
Release Date: November 7, 2026
The second half of the 100-day mission begins to move the larger conflict forward.
Episode 10
Release Date: November 8, 2026
The relationships between the main characters face additional pressure.
Episode 11
Release Date: November 14, 2026
The resistance and Government-General storylines continue to collide.
Episode 12
Release Date: November 15, 2026
Ga-kyeong’s mission becomes increasingly dangerous as the story approaches its final stage.
Episode 13
Release Date: November 21, 2026
Hidden motives and personal loyalties become increasingly important.
Episode 14
Release Date: November 22, 2026
The consequences of the characters’ choices begin to shape the final part of the story.
Episode 15
Release Date: November 28, 2026
The 100-day mission approaches its conclusion and the major conflicts move toward a climax.
Episode 16
Release Date: November 29, 2026
The final episode is expected to conclude Ga-kyeong’s mission and resolve the major storylines involving the resistance, Tae-woong, and their complicated relationship.
Note: Episode descriptions above are intentionally spoiler-safe. Detailed plot information should be updated after each episode officially airs.
Who Is the Main Character in 100 Days of Deception?
The main character is Lee Ga-kyeong, played by Kim You-jung.
She begins the story as a talented pickpocket who dreams about leaving Gyeongseong and starting a new life.
Her decision to become an undercover spy changes everything.
Is 100 Days of Deception a Romance Drama?
Yes.
The drama is officially positioned as a period spy romance, combining romance with historical drama, action, and espionage.
The relationship between Lee Ga-kyeong and Kim Tae-woong is one of the central storylines.
Is 100 Days of Deception Based on a True Story?
The drama is presented as a fictional historical series rather than a direct retelling of one specific real person’s life.
However, it uses the historical setting of Japanese-occupied Korea and incorporates the broader atmosphere of the Korean independence movement.
The fictional characters and spy mission are placed within that historical environment.
Is 100 Days of Deception Based on a Webtoon?
The currently published production information credits Ryu Bo-ri as the screenwriter and does not identify a webtoon or novel as the source material.
The drama is therefore best described as an original scripted series unless later official credits state otherwise.
Who Is the Director of 100 Days of Deception?
The drama is directed by Yoo In-shik, a filmmaker known for major Korean television productions including the Dr. Romantic series and Extraordinary Attorney Woo.
His experience with character-driven drama and emotionally intense storytelling is one of the notable production points of the series.
Who Is the Writer of 100 Days of Deception?
The screenplay is written by Ryu Bo-ri.
She is known for writing dramas including Do You Like Brahms?.
For 100 Days of Deception, she combines historical drama, romance, espionage, and character development into one story.
100 Days of Deception Production
The drama is produced by Studio Dragon and Nangman Crew.
It has been positioned as a major tvN historical production and is part of tvN’s 2026 programming lineup.
The production team has paid particular attention to recreating 1930s Gyeongseong and the atmosphere of the Japanese occupation.
Main Themes of the Drama
Identity and Deception
Almost every major character has something to hide.
Ga-kyeong is living under a false identity, while Tae-woong’s own identity is complicated by his Korean and Japanese names and his relationship with Sato Shinichi.
Personal Freedom
Ga-kyeong’s original dream is to leave Korea and build a new life.
Her journey raises questions about what freedom means when an individual is caught inside a much larger historical conflict.
Love and Loyalty
The romance between Ga-kyeong and Tae-woong is complicated by their opposing circumstances.
The drama asks whether personal feelings can survive when loyalty and survival are constantly being tested.
Courage
Ga-kyeong’s decision to enter the Government-General puts her life at risk.
Her transformation from pickpocket to spy is an important part of the story.
Individual and Community
The drama also explores how an individual’s life can become connected to the fate of a larger community.
At the recent production presentation, Kim You-jung described the story as being about the process of individuals becoming part of a “we,” while the production team emphasized the characters’ transformation during a turbulent period.
Why You Should Know the Characters Before Watching
100 Days of Deception contains several characters with multiple identities and complicated relationships.
The main character is called Lee Ga-kyeong, while the male lead is Kim Tae-woong, who is also known as Sato Hideo.
Knowing these names before watching can make the early episodes easier to follow, especially because the story involves Korean and Japanese characters, resistance members, government officials, spies, and interpreters.
Where to Watch 100 Days of Deception
In South Korea, 100 Days of Deception is scheduled to air on tvN.
For international audiences, the drama is scheduled to be available on Netflix beginning October 10, 2026.
100 Days of Deception Ending
Since the drama has not aired yet, its ending is not officially available.
The final outcome of Ga-kyeong’s 100-day mission, her relationship with Tae-woong, and the fate of the other major characters should become clear as the episodes are released.
Any detailed ending currently circulating online should be treated carefully until the actual episodes have aired.
Will 100 Days of Deception Have Season 2?
There is currently no confirmed Season 2 announcement.
The story has been planned as a 16-episode series, with the complete first season scheduled to run from October 10 to November 29, 2026.
Whether another season could happen would depend on the completed story, audience response, and an official renewal decision.
100 Days of Deception FAQs
What is 100 Days of Deception about?
It is a historical spy romance about a talented Gyeongseong pickpocket who infiltrates the Japanese Government-General as an undercover spy for the independence movement.
Who plays Lee Ga-kyeong?
Kim You-jung plays Lee Ga-kyeong.
Who plays Kim Tae-woong?
Park Jin-young plays Kim Tae-woong, also known as Sato Hideo.
How many episodes does 100 Days of Deception have?
The drama is planned for 16 episodes.
When does 100 Days of Deception premiere?
The first episode is scheduled for October 10, 2026.
Where can I watch 100 Days of Deception?
The drama airs on tvN in South Korea and is scheduled for international streaming on Netflix.
What genre is 100 Days of Deception?
It is a historical spy romance with elements of action, thriller, and drama.
What year is 100 Days of Deception set in?
The story is set in 1932, in Gyeongseong.
Is Kim Tae-woong also called Sato Hideo?
Yes. Kim Tae-woong uses the Japanese name Sato Hideo.
Is the drama based on real events?
The characters and main spy story are fictional, but the drama uses the real historical setting of Korea under Japanese occupation.
Final Thoughts
100 Days of Deception brings together historical drama, espionage, action, and romance through the story of a pickpocket who becomes an undercover spy.
At the center of the series is Lee Ga-kyeong, a woman who initially wants nothing more than to escape her circumstances. Her decision to accept a 100-day spy mission puts her inside one of the most dangerous places possible, where she must hide her identity while dealing with people who could expose her at any moment.
Her relationship with Kim Tae-woong adds another layer to the story because the person she becomes emotionally connected to is closely tied to the organization she has infiltrated.
With Kim You-jung and Park Jin-young leading the cast, along with Kim Hyun-joo, Lee Moo-saeng, and Jin Sun-kyu, the drama is built around characters whose loyalties and secrets constantly overlap.
The combination of a 1932 Gyeongseong setting, undercover missions, hidden identities, resistance activity, and romance makes 100 Days of Deception one of the major historical K-drama releases scheduled for October 2026.