A pickpocket turned spy, a 100‑day mission inside the Japanese Government‑General, and a high‑stakes romance set in 1930s Gyeongseong here’s what to know before the October 10 premiere.
What is 100 Days of Deception?
100 Days of Deception is a 2026 South Korean period spy romance set during the Japanese occupation of Korea in the 1930s.
The story follows Lee Ga Gyeong, Gyeongseong’s most skilled pickpocket, who accepts a deal with the independence movement to infiltrate the Japanese Government‑General of Korea as an interpreter trainee for exactly 100 days.
Her mission quickly becomes more dangerous and more personal when she crosses paths with Kim Tae‑woong (also known as Sato Hideo), an elite interpreter and the adopted son of Inspector General Sato Shinichi.
Release date and where to watch
• Premiere date: Saturday, October 10, 2026
• Time slot: 9:10 p.m. KST (7:10 p.m. WIB)
• Channel: tvN (South Korea), airing every Saturday and Sunday
• Episodes: 16 episodes, running until November 29, 2026
• Streaming: Netflix (global), starting October 10, 2026
Main cast and characters
• Kim Yoo Jung as Lee Ga Gyeong – a genius pickpocket in 1930s Gyeongseong who becomes a spy for the independence army.
• Park Jin Young (JYP) as Kim Tae‑woong / Sato Hideo – an elite interpreter at the Government‑General and the adopted son of Inspector General Sato.
• Kim Hyun Joo as Yoo So Ran – a sharpshooter for Gugukdan, an anti‑Japanese organization seeking revenge.
• Jin Sun Kyu as Sato Shinichi – Inspector General of the Japanese Government‑General in Korea.
• Lee Mu Saeng as Yoo Philip – a Gyeongseong correspondent working for a U.S. news agency and part of the independence network.[idntimes]
The drama is directed by Yoo In Shik (Extraordinary Attorney Woo) and written by Ryu Bo Ri.
Plot: the 100‑day mission at a glance
• Lee Ga Gyeong’s original goal is simple: save enough money to move to the United States.
• She is recruited by Yoo So Ran of Gugukdan to infiltrate the Government‑General and help target Inspector General Sato Shinichi.
• Posing as an interpreter trainee, Ga Gyeong plans to act as a “fake spy” serving her own interests but soon begins feeding crucial intel to the independence fighters.
• Inside the Government‑General, she meets Kim Tae‑woong, whose loyalty and identity are far more complicated than they appear.
• Over 100 days, their lives intertwine in a web of lies, danger, and forbidden romance against the backdrop of Korea’s struggle for independence.
Why this K‑drama is generating buzz
• High‑concept hook: “100 days” creates a built‑in countdown and tension for every episode.
• Fresh genre mix: Pickpocket‑turned‑spy action, period detail, and a tense office‑politics thriller inside the colonial administration.
• Star power: Kim Yoo Jung’s return to a bold, gritty role and Park Jin Young’s first major period drama lead.
• Creative team: Director Yoo In Shik’s track record with character‑driven hits adds weight to the project.
What to expect tonally
Expect a tight, suspenseful spy romance with:
• Undercover operations and close‑call escapes.
• Moral dilemmas around collaboration, resistance, and survival
• A slow‑burn, high‑risk love story where trust is a weapon
Early coverage hints at a bittersweet, possibly tragic arc for the central couple, with the trailer already sparking fan theories about hidden goodbyes.
Quick facts at a glance
• Title: 100 Days of Deception (original Korean title: 100‑il‑ui Geojitmal / “100 Days of Lies”)
• Genre: Period, spy, romance, action thriller
• Setting: 1930s Gyeongseong (Seoul) under Japanese rule
• Format: 16 episodes, weekend drama (Sat–Sun)
• Network: tvN; Global streamer: Netflix