Ning and Kawin are a couple with a seven-year-old daughter, Ing. The three decide to move to a condo and rent out their house to two tenants: Ratree, a retired doctor, and her forty-year-old daughter Nuch. After the new tenants have moved in, Ning notices that Kawin begins to exhibit unusual behaviour. He becomes secretive and often disappears from the condo at 4 a.m. Kawin even sports a triangle-shaped tattoo—the same design as Nuch’s. As her husband’s behaviour becomes increasingly disturbing, Ning realizes that her daughter is being preyed on by some unseen sinister force. She has to do everything to protect her daughter from this dark cult!