Mira and Todd are struggling to come to terms with their son’s newly diagnosed condition requiring a special diet and physical treatment in order to live. They hire a live-in nurse, Gwen, who plans to take Todd and their son from Mira in order to become the new mother of the household. When Mira feels constantly fatigued and nauseous, it becomes clear Gwen is an “angel of death” who is intent on turning this family into her forever home.