Kim Yoo-jung and Park Jin-young Lead tvN's Colonial Spy Romance Starting October 10

Director Yoo In-shik, whose Romantic Doctor Kim Sa-bu series reached a peak rating of 27.6% and whose Extraordinary Attorney Woo became one of the most-watched Korean dramas internationally in 2022, is returning with a period spy romance on tvN. 100 Days of Lies premieres on October 10 at 9:10 p.m. and runs on Saturdays and Sundays.

The pairing of Yoo with writer Ryu Bori, who built a reputation for emotionally precise dialogue on Do You Like Brahms?, reflects a familiar industry calculus: when a cable network bets on a costly period production, it tends to anchor the project with a creative team whose track record reduces risk. The 1932 colonial Gyeongseong setting, lavish in both costume and production design based on the stills released so far, suggests 100 Days of Lies is that kind of bet.

The premise

The drama follows two people who cannot afford to tell each other the truth. Lee Ga-kyung (Kim Yoo-jung) is the most skilled pickpocket in Gyeongseong, whose only ambition is to steal enough to buy passage to America. She accepts an offer she can't refuse and spends 100 days undercover inside the Japanese Government-General of Korea, posing as a translation intern under the alias Geum Seo-hee.

Kim Tae-woong (Park Jin-young) is the Government-General's new elite interpreter, the adopted son of Political Affairs Superintendent Sato Shin-ichi (played by Jin Seon-kyu), and a man who has lived his entire life under a Japanese name, Sato Hideo. He is meticulous to the point of rigidity, and when the suspicious new intern crosses his path, the equilibrium he has maintained starts to fracture.

The show describes its central tension as the contradiction built into the act of interpreting itself: a translator's job is to render another person's meaning faithfully, but both of these people are professionally committed to concealing their own. That framing gives the spy mechanics a layer of thematic weight that straightforward action-romance period dramas often skip.

Cast and production

Along with Kim Yoo-jung and Park Jin-young, the supporting cast includes Kim Hyun-joo, Lee Moo-saeng, Jin Seon-kyu, Lee Ki-young, Choi Duk-moon, Seo Jeong-yeon, Kim Do-hyun, and Kim In-kwon. Several of them have individually crossed the 10-million-ticket threshold in Korean film, which is how the production has been quietly promoting the ensemble.

First-look stills released earlier in September show Kim Yoo-jung in a short-bobbed wig and fitted Western-style suit, her expression carefully neutral but her eyes tight with suppressed anxiety. Park Jin-young's character holds a sharper, more probing gaze. The contrast between the two is doing most of the visual storytelling in the promotional materials.

A main poster released on the 10th places the two characters close enough to touch inside what appears to be an office, the framing suggesting a standoff rather than an embrace. The tagline reads: "Just once, tell me something that isn't a lie." Whether that line belongs to him or to her is, presumably, the question the show intends to spend 100 days answering.

100 Days of Lies airs on tvN beginning October 10.