Netflix's New Period K-Drama '100 Days of Deception' Just Got an October Release Date — And Kim You Jung Is Going Full Spy Mode

Mark Your Calendars: 100 Days of Deception Hits Netflix on October 10

Just when you thought Netflix's K-drama slate couldn't get any more packed for the rest of 2026, along comes another reason to clear your weekend schedule. 100 Days of Deception, the new period romantic-action thriller from Korean cable network tvN, officially lands on Netflix worldwide on October 10, 2026 — and honestly, this one has "next obsession" written all over it.

The series (formerly known as 100 Days of Lies) just dropped its first script reading photos and video, giving fans an early look at the chemistry between leads Kim You Jung and Park Jin Young. And if that table read is anything to go by, we're in for something special.

A Pickpocket Turned Wartime Spy — Yes, Please

The premise alone is enough to hook any sageuk lover. Set during the Japanese occupation of Korea, the story follows Lee Ga Gyeong (played by Kim You Jung), a genius pickpocket who ends up working for the Korean independence army. Her mission? Go undercover as a spy inside the Japanese Government-General of Korea.

Here's the twist: Ga Gyeong only plans to pose as a fake spy to serve her own interests. But as these stories tend to go, she soon finds herself feeding genuinely crucial intelligence to the independence movement — and presumably falling into a whole lot of danger (and maybe love) along the way. Romantic-action thriller isn't just a genre mashup here; it's practically a promise.

Behind the camera, the pedigree is seriously impressive. The series is directed by Yoo In Shik, the man behind beloved hits like Extraordinary Attorney Woo and Dr. Romantic, with a script by writer Ryu Bo Ri. That combination of sharp emotional storytelling and slick production value is exactly what a period spy drama needs.

A Cast That Screams Prestige Weekend Drama

Kim You Jung headlining is already big news — millennial and Gen Z viewers will recognize her from Netflix titles like My Demon, Chicken Nugget, and the film 20th Century Girl. This role, though, looks like her most action-heavy turn yet.

She's joined by an ensemble that reads like a K-drama awards show guest list:

• Park Jin Young — fresh off leading Our Unwritten Seoul, taking on his first major period role
• Kim Hyun Joo — the veteran actress who brought chilling gravitas to Hellbound
• Jin Seon Kyu — the scene-stealing charmer from comedy-crime hit Extreme Job
• Lee Moo Saeng — rounding out the five leads

The Release Details You Actually Need

Here's how your viewing calendar shapes up: 16 episodes total, airing weekly on Saturdays and Sundays starting October 10, with runtimes around 70 minutes each. Mark November 29, 2026 down too — that's when the finale drops. Two months of cozy weekend binge-watching, sorted.

The Bottom Line

Between 100 Days of Deception and the record-breaking runs of other 2026 K-dramas, Netflix is clearly betting big on Korean content heading into next year — and this stylish occupation-era spy romance might just be its smartest play yet. With Yoo In Shik directing, a stacked cast, and a premise that blends history, action, and romance, this is one fall release that deserves a spot on your watchlist right now.

100 Days of Deception premieres October 10, 2026, on tvN and streams worldwide on Netflix.