Hyun-su and Soo-jin are newlyweds. Seemingly out of nowhere, Hyun-su starts talking in his sleep: “Someone’s inside.”

From that night on, whenever he falls asleep, he transforms into someone else with no recollection of what happened the night before. Despite sleep treatment, Hyun-su’s sleepwalking only intensifies, and his wife begins to feel that their unborn child may be in danger…

This darkly comic horror debut from Jason Yu, assistant director on Bong Joon-ho’s Okja, featuring a show-stopping lead performance from the late Parasite actor Shun-kyun Lee, showcases the cinematic talent emerging from contemporary South Korea.