Chimipja

Intruder follows Seo-jin (Kim Mu-yeol), an architect grieving the loss of his wife, as he is reunited with his long-lost younger sister, Yoo-jin (Song Ji-hyo), who went missing 25 years ago. As Yoo-jin's family welcomes her back, Seo-jin grows suspicious, leading him to uncover a shocking truth. He teams up with a detective (Heo Joon-seok) to unravel the mystery, which reveals a dark cult that has been manipulating Yoo-jin and her family.