Colony (군체) is a 2026 Korean zombie-thriller directed by Yeon Sang-ho, in which a mysterious outbreak traps survivors inside a locked-down Seoul skyscraper as the infected evolve from crawling attackers into something far more coordinated. Released in theaters on May 21, 2026, the film marked Yeon's first big-screen zombie blockbuster since Train to Busan and Peninsula, made on a budget of roughly 20 billion won, and became one of the biggest Korean theatrical releases of the year within weeks of its debut.
Plot
The story follows Kwon Se-jung, a bioengineering professor who accepts an unexpected invitation from her ex-husband to attend a biotech industry conference held inside a high-rise building in Seoul. The gathering turns into chaos when Seo Young-chul, a man harboring a grudge against the event's host, sets off a large-scale bioterror incident inside the building. As the tower is sealed off, the infected inside don't stay in their initial crawling state — they gradually evolve, learning to walk upright, recognize individual targets, and hunt in coordinated groups, forcing the trapped survivors to fight their way upward through increasingly dangerous floors in search of an antidote.
Cast and Cannes Selection
Colony marked Jeon Ji-hyun's return to the big screen for the first time in eleven years since Assassination (2015), starring as Kwon Se-jung. She's joined by Gu Kyo-hwan in an against-type villain role as Seo Young-chul, along with Ji Chang-wook, Shin Hyun-bin, Kim Shin-rok, and Go Soo rounding out the main survivor ensemble. Ahead of its Korean theatrical release, the film was selected for the Midnight Screenings section (a non-competition category) at the 79th Cannes Film Festival, giving it an international festival launch before opening domestically.
Box Office Run
Colony opened strong and kept climbing: it crossed one million admissions within four days of release, two million by day five, and three million by day ten, eventually surpassing five million admissions in Korea by mid-June. The film also performed unusually well overseas for a Korean theatrical title — its opening in Thailand set records for a Korean film's opening-weekend box office in that market, ranking among the top openings of any film released in Thailand in 2026.
Colony at a Glance
| Detail | Information |
|---|---|
| Director | Yeon Sang-ho |
| Genre | Action, thriller, zombie horror |
| Runtime | 122 minutes |
| Korean Release | May 21, 2026 |
| Lead Cast | Jeon Ji-hyun, Gu Kyo-hwan, Ji Chang-wook, Shin Hyun-bin, Kim Shin-rok, Go Soo |
| Festival Selection | 79th Cannes Film Festival, Midnight Screenings (non-competition) |
Frequently Asked Questions
What is Colony (군체) about?
It follows survivors trapped inside a sealed Seoul skyscraper during a bioterror-triggered outbreak, as the infected evolve from crawling attackers into coordinated, upright hunters.
Who stars in Colony?
The main cast includes Jeon Ji-hyun, Gu Kyo-hwan, Ji Chang-wook, Shin Hyun-bin, Kim Shin-rok, and Go Soo.
Is Colony related to Train to Busan?
It's not a direct sequel or shared-universe entry, but it is director Yeon Sang-ho's first theatrical zombie film since the Train to Busan franchise.
Did Colony premiere at Cannes?
It was selected for the Midnight Screenings section at the 79th Cannes Film Festival, a non-competition category, ahead of its Korean theatrical release.
How well did Colony do at the box office?
The film surpassed five million admissions in Korea within weeks of release and also set opening-weekend records for a Korean film in the Thai market.
Box office figures and streaming availability may continue to change after publication — check official distributor or theater listings for the latest numbers.