His caretaker has a son named Danny (John Bloom) who is an extremely strong full-grown man, but he has the mind of a child due to brain damage sustained in a mine accident.

In an unusual turn of events, Manuel Cass (Albert Cole), a recently escaped mental patient and serial killer, has murdered Dr. Girard's caretaker and is seriously injured himself.

'"[7] Kevin Thomas of the Los Angeles Times called the film "lots of fun because this AIP release has been so thoroughly worked out, with good, legitimate performances, logical plot development and taut directing and editing.

"[8] David McGillivray of The Monthly Film Bulletin wrote, "Uproarious nonsense, looking very much like a piece of low budget Fifties horror and performed with very little finesse, but quite watchable none the less.

"[9] In 1989, horror punk band Haunted Garage recorded a song of the same title based on the film for their 7-inch EP Mothers Day.