After turning a high-speed rail trip into one of the defining zombie thrillers of the last decade with “Colony,” Yeon Sang-ho is back in outbreak mode. The South Korean filmmaker behind “Train to Busan,” “Peninsula,” and Netflix’s “Hellbound” has returned with a new Korean zombie thriller, and that locks its survivors inside a sealed biotech facility as the infected begin to change in grotesque new ways.
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The Cannes Film Festival has released a new teaser trailer for “Colony,” Yeon’s latest genre swing, which stars Gianna Jun (“My Sassy Girl,” “Kingdom: Ashin of the North”) as Professor Se-jeong, a biotechnology professor who attends a conference that descends into a nightmare after a rapidly mutating virus is released. As authorities seal the facility to contain the outbreak, Se-jeong and a small group of survivors are trapped inside with no route out and an escalating threat closing in around them.
The film also stars Koo Kyo-hwan (“Peninsula,” “Escape from Mogadishu”), Ji Chang-wook (“The Worst of Evil”), Shin Hyun-been (“Hospital Playlist”), Kim Shin-rock (“Hellbound”), and Go Soo (“Missing: The Other Side”). Yeon directs from a screenplay he co-wrote with Choi Gyu-seok, his frequent collaborator on “Hellbound” and “The Fake.”
Cannes has programmed “Colony,” listed under its Korean title, “Gun-che,” as part of the 2026 Official Selection in the Out of Competition Midnight Screenings section. The slot fits Yeon’s return to zombie horror: where “Train to Busan” turned an outbreak into a social pressure cooker and “Peninsula” expanded the world into a bigger action canvas, “Colony” tightens the frame around a sealed biotech facility, a mutating virus, and survivors trapped inside as the infected transform.
Well Go USA will release “Colony” in theaters on August 28, 2026. Watch the trailer below.
Rodrigo Perez is the founder and editor-in-chief of The Playlist, which he launched in 2008. He has worked in entertainment journalism since 2000, including at MTV, and has written for SPIN, IndieWire, Pitchfork, Complex, Magnet, and various music, film, and entertainment publications over the past two decades.
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