In a large house in the suburbs, single mother Madison Heller (Ellie Rat Ali Larter) lives alone with a pair of children Jacob (Max Ross Max Rose) and Haley (Colo Palin Chloe Perrin). But recently she was frightened because in the silent night, she and the children had seen a terrible monster appear in the room. The terrorist incident became more and more serious, the children were greatly traumatized physically and mentally, and the life of the Heller family was in chaos. During this period, she also asked relevant organizations to investigate, but the other party was scared and fled. In times of despair, she can only choose to trust her boyfriend Nikolai (Arjun Gupta Arjun Gupta). Nikolai used sophisticated instruments to investigate, and did not expect to summon the entity of the monster. The Heller family's nightmare is far from over, and they have to be trapped in this familiar and horrible home.