In a large house in the suburbs, single mother Madison Heller (Ali Larter) lives alone with her two children, Jacob (Max Rose) and Haley (Chloe Perrin). But she has been frightened recently because she and her children have witnessed a terrible monster appear in the room in the quiet night. The terrorist incidents intensified, the children were greatly traumatized physically and mentally, and the life of the Heller family was in chaos. During this period, she also looked for relevant organizations to investigate, but the other party was scared and fled. In a desperate moment, she could only choose to believe her boyfriend Nicholas (Arjun Gupta). Nicholas used sophisticated instruments to investigate, but he never thought that he would summon the monster's entity. The nightmare of the Heller family is far from over, and they have to be trapped in this familiar and terrifying home...