The film stars Michael Higgins, Lois Holmes, Jean Allison, Doris Fesette and Malcolm Lee Beggs.

[1][2] The film was summarized in TV Guide as "sick low-budget grossness about a psychopathic young beachcomber, Higgins, who pretends to befriend a mother and two daughters living at their summer home.

"[2] The film begins with a voice over by a psychiatrist discussing his patient: a young war veteran and struggling artist, Richard Barrie, who had asked to be confined but said that "society acts only after a crime has been committed."

Richard's co-worker at the local bookstore works knows that he is a disturbed individual who isolates himself; she feels he is too focused on the Hacketts and encourages him to take his doctor's advice to make some new friends.

At the cottage, Richard sets himself up to stay each weekend in a shed on the property, after Louisa complains about him using the guest room she wants kept free for her boyfriend when he comes for visits.

Frightened, Florence phones Louisa, who has had to return to the city; she tells her mother to get a neighbor boy to stay overnight with them.

As Louisa goes to comfort her sister, the boyfriend enters the house to find that Richard has fled, leaving behind Florence's dead body.