Jonathan is a very lonely man. One day, he gets a visitor in his house: a young woman who, through a jarring turn of events, ends up dead. He does not report it because he is happy to have a friend, but now the body begins to decay.
A social worker, still reeling from the loss of her architect husband, investigates the eccentric, psychedelic Wadsworth Family, consisting of a mother, two daughters, and an adult son with the apparent mental capacity of an infant.