Hyun-su and Soo-jin are newlyweds. Seemingly out of nowhere, he 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. Soo-jin is overwhelmed with anxiety that he’d hurt her family while she sleeps and can barely sleep a wink because of this irrational fear. Despite sleep treatment, Hyun-su’s sleepwalking only intensifies, and she begins to feel that her unborn child may be in danger…
![Backdrop of Sleep](https://image.tmdb.org/t/p/w1000_and_h450_multi_faces/8kgfR6KwCwc6WA2AY1wqBXkYpEy.jpg)
Top Billed Cast
View all![Jung Yu-mi](https://image.tmdb.org/t/p/w276_and_h350_face/pU8iBcZHhuc4kQe6HHZVcommefG.jpg)
Jung Yu-mi
Soo-jin
![Lee Sun-kyun](https://image.tmdb.org/t/p/w276_and_h350_face/nHFBbSFohzOUOvMxPVwe3Es2nJw.jpg)
Lee Sun-kyun
Hyun-su
![Kim Kuk-hee](https://image.tmdb.org/t/p/w276_and_h350_face/vbcRnt6e81ZG2Hrqb10my8jK5jq.jpg)
Kim Kuk-hee
Min-jung
![Lee Kyung-jin](https://image.tmdb.org/t/p/w276_and_h350_face/3ZXDb0GThBAwySFHenbmm18rXAp.jpg)
Lee Kyung-jin
Soo-jin's Mother
![Yoon Kyung-ho](https://image.tmdb.org/t/p/w276_and_h350_face/217cVZqyvJypi4OR1uvxoaJxvLm.jpg)
Yoon Kyung-ho
Doctor
![Kim Keum-soon](https://image.tmdb.org/t/p/w276_and_h350_face/jzMDWmOfa87MOQe84BXBqDYa97X.jpg)
Kim Keum-soon
Shaman
![Kim Jun](https://image.tmdb.org/t/p/w276_and_h350_face/1A3whMMs8iSnG92tnjujqV19opN.jpg)
Kim Jun
Jin-hyeok
![Lee Dong-chan](https://image.tmdb.org/t/p/w276_and_h350_face/duOrQOEbjjbtMFrm7MbFrV0Ft3E.jpg)
Lee Dong-chan
Park Chun-gi
![Park Hyun-jeong](https://image.tmdb.org/t/p/w276_and_h350_face/sylt53zTc9rfMQ2E89hBxYtCUAy.jpg)
Park Hyun-jeong
Nurse
Media
![Official UK trailer [Subtitled]](https://i.ytimg.com/vi/bTDFXHbtuTo/hqdefault.jpg)
![Official Main Trailer [Subtitled]](https://i.ytimg.com/vi/s8klyTVeXUk/hqdefault.jpg)
![In Cinemas 12 July [Subtitled]](https://i.ytimg.com/vi/TFg5H1IGB0o/hqdefault.jpg)
![Special Clip [Subtitled]](https://i.ytimg.com/vi/nDAxNzLkSFM/hqdefault.jpg)