A wealthy Philadelphia couple, Dorothy and Sean Turner, experience a fracture in their marriage after the death of their 13 week-old son, Jericho. The couple undergoes transitory object therapy using a lifelike reborn doll after Dorothy experiences a full psychotic break. The doll, which Dorothy believes is her real child, was the only thing that brought her out of a catatonic state following Jericho's death. Six weeks after his death, they hire a young nanny, Leanne (Nell Tiger Free), to move in and take care of Jericho, the reborn doll, opening their home to a "mysterious force". While Sean deals with the grief on his own, he becomes deeply suspicious of Leanne.