A group of teenage girls spends the night in an old dark mansion as an initiation into a college sorority. What they don't know is that the building is actually the headquarters for a mad scientist and his hunchbacked assistant, who are experimenting with turning humans into gorillas.

• Vic McGee
• James Reason
• Clara Nadel
• Pauline Hillkurt
• Charles Hegen
• Peter James Noto