Southern California is being terrorized by a mysterious murderous monster living in a cave. As the bodies pile up -- with incriminating banana peels always near by the crime scene -- a group of teens stumble on the guilty party: a 20-million-year-old Schlockthropus, an ape-like creature with a sense of the absurd. Schlocky moves easily through a strangely stupid suburban society, the members of which don't seem to see him as a hairy menace. Young Mindy Binermen (Eliza Garrett), blind for the last three years, falls in love with him thinking he's a dog. When an operation to restore her eyesight proves successful, she discovers her pet is a lovesick gorilla being chased by the National Guard.