Jason Yu's Sleep follows a young couple whose home life unravels when the husband's sleepwalking turns unpredictable and unsettling, blurring the line between domestic comedy and creeping horror.
What is Sleep about?
A pregnant wife notices her husband's sleep has started to change in disturbing ways, from muttering strange phrases to acting out of character in the middle of the night. What begins as an odd habit escalates into something she can no longer dismiss, and she sets out to find a way to protect her family before the behavior puts anyone in danger. The 2023 South Korean film moves between tones deliberately, treating the couple's situation with genuine warmth even as the tension builds, so that the growing dread never fully erases the sense that these are two people who care about each other. Writer-director Jason Yu keeps the scale small and the setting mostly confined to their apartment, which sharpens the feeling that something ordinary has quietly become unsafe.
About the cast
Jung Yu-mi and Lee Sun-kyun lead the film as the couple at its center, supported by Kim Kuk-hee, Lee Kyung-jin, Yoon Kyung-ho, Kim Keum-soon, Lee Dong-chan, and Park Hyun-jeong in a cast drawn from South Korea's deep bench of character actors.
Context & significance
Sleep comes from South Korea, a country whose genre filmmakers have built a reputation for blending horror, comedy, and family drama within a single story rather than keeping them separate. That mix is central to how the film plays: the humor of early married life sits right beside a mystery that keeps deepening, and the 95-minute runtime keeps the pacing tight rather than letting either register overwhelm the other. It is the kind of premise that rewards close attention to small domestic details, since the film builds its unease gradually rather than through a single big reveal.
Watching Sleep on Ktime
Sleep can be streamed on K-Time with a free account login, and the service's Farsi-language interface makes browsing and watching straightforward for Persian-speaking audiences. The film is available with Persian dubbing and Persian subtitles, so viewers can pick the option that fits how they prefer to watch.