If you’re searching for a Korean drama that combines romance, espionage, history, action, and emotional storytelling, 100 Days of Lies deserves a spot at the top of your watchlist. Starring Kim Yoo-jung and Park Jin-young, this highly anticipated 2026 series transports viewers to the turbulent era of Japanese-occupied Korea, where every secret can mean the difference between life and death.

Directed by acclaimed filmmaker Yoo In-shik and written by Ryu Bo-ri, the drama tells the gripping story of a talented pickpocket who is forced to become an undercover spy for the Korean independence movement. What begins as a mission for survival soon evolves into a dangerous fight for freedom, identity, and love.

Featuring breathtaking period sets, high-stakes espionage, emotional romance, and a stellar supporting cast, 100 Days of Lies promises to deliver one of the year’s most unforgettable historical K-dramas. Whether you’re a fan of suspense-filled thrillers or heartfelt romances, this series has all the ingredients to become your next binge-watch.

Quick Drama Facts

• Drama Title: 100 Days of Lies (100일의 거짓말)
• Genre: Historical, Spy, Romance, Action, Thriller
• Country: South Korea
• Language: Korean
• Episodes: 16
• Director: Yoo In-shik
• Writer: Ryu Bo-ri
• Production Companies: Studio Dragon, Nangman Crew
• Network: tvN
• Streaming Platform: Netflix
• Expected Release: October 2026
• Runtime: Approximately 70 minutes per episode

Plot Summary

Set in 1930s Gyeongseong during the Japanese colonial era, 100 Days of Lies follows Lee Ga-kyung, the city’s most skilled pickpocket and con artist. Despite her remarkable talent for deception, she dreams of leaving Korea behind and starting a peaceful life overseas.

Her plans change dramatically when members of the Korean independence movement approach her with an extraordinary proposal. She must infiltrate the Japanese Government-General by posing as an interpreter and remain undercover for 100 days. Every day of the mission places her life at greater risk as she gathers intelligence while surrounded by powerful enemies.

Inside the government building, Ga-kyung meets Kim Tae-woong, also known as Sato Hideo, an elite interpreter who appears loyal to the Japanese administration but hides painful secrets of his own. As political conspiracies deepen and hidden identities begin to unravel, the two find themselves caught between duty, survival, and an unexpected romance.

With assassinations, betrayals, resistance fighters, and emotional sacrifices at every turn, the drama explores how courage can emerge even from those who never intended to become heroes.

Cast and Characters

Kim Yoo-jung as Lee Ga-kyung

Kim Yoo-jung transforms into Lee Ga-kyung, an exceptionally talented pickpocket whose intelligence, confidence, and quick thinking make her the perfect undercover operative. Initially motivated by money and the dream of escaping Joseon, she gradually discovers the true cost of freedom. Throughout her journey, she evolves from a skilled thief into a courageous woman willing to risk everything for her country and the people she loves.

Park Jin-young as Kim Tae-woong / Sato Hideo

Park Jin-young plays the mysterious Kim Tae-woong, a multilingual interpreter fluent in Korean, Japanese, and English. Raised by the ruthless Japanese Inspector-General Sato Shinichi, Tae-woong struggles with questions about his identity and loyalty. His growing relationship with Ga-kyung forces him to choose between the life he has always known and the truth hidden within his heart.

Kim Hyun-joo as Yoo So-ran

Kim Hyun-joo portrays Yoo So-ran, one of the Korean independence movement’s most fearless snipers. Determined to avenge her family’s suffering, she becomes a mentor and protector for Ga-kyung while leading dangerous resistance operations against the colonial government. Her courage and unwavering determination make her one of the drama’s strongest characters.

Lee Moo-saeng as Phillip Yoo

Lee Moo-saeng stars as Phillip Yoo, a journalist working as a correspondent for an American news agency. While reporting on events in Gyeongseong, he secretly uncovers hidden conspiracies and plays a significant role in exposing the truth behind the occupation. His investigative work places him in constant danger.

Jin Seon-kyu as Sato Shinichi

Jin Seon-kyu takes on the role of the ambitious Inspector-General Sato Shinichi. Cold, calculating, and determined to maintain absolute control over Korea, he serves as the story’s primary antagonist. His complicated relationship with his adopted son, Tae-woong, creates some of the drama’s most emotionally intense moments.

Park Jung-yeon as Kim Myung-nam

Park Jung-yeon appears as Kim Myung-nam, a supporting character whose involvement with the independence movement gradually becomes increasingly important as the story unfolds.

Why You Should Wait For 100 Days of Lies

• Kim Yoo-jung takes on one of the most mature and action-packed roles of her career.
• Park Jin-young returns with a complex historical character filled with emotional depth.
• A unique blend of romance, espionage, thriller, and historical drama.
• Stunning cinematography and large-scale period production.
• Powerful story inspired by Korea’s independence movement.
• Emotional character development alongside suspense-filled missions.
• Directed by Yoo In-shik, known for creating critically acclaimed dramas.

Where to Watch

100 Days of Lies will premiere on tvN in South Korea and will be available for international viewers on Netflix, with weekly episode releases expected beginning in October 2026.

Final Thoughts

Among the many Korean dramas arriving in 2026, 100 Days of Lies stands out for its compelling combination of historical storytelling, thrilling espionage, heartfelt romance, and unforgettable characters. With Kim Yoo-jung and Park Jin-young leading an outstanding cast, the series promises emotional performances, breathtaking action sequences, and a story that explores sacrifice, hope, and the true meaning of freedom.

If you enjoy dramas such as Mr. Sunshine, Youth of May, or Chicago Typewriter, this upcoming series is one you won’t want to miss. As the countdown to its premiere continues, 100 Days of Lies is already shaping up to be one of the biggest K-drama releases of 2026.