While diving, Matt Farrell (Ashley) is kidnapped by Neva Gordon (Pat Woodell) and Steinman (Jan Merlin) and taken to an island where Neva's father Dr. Gordon (Charles Macaulay) is experimenting, trying to make a "super race" by combining humans and animals. Dr. Gordon wants Farrell to be one of his upcoming experiments, but Neva begins to doubt her fathers' work following a botched experiment on another test subject and falling in love with Farrell. She decides to help Farrell and the animal people escape. Steinman and his men hunt them down.