Dr. Gorman (Lionel Atwill) is a millionaire adventurer, traveling the world in search of dangerous game. His bored, beautiful, much younger wife (Kathleen Burke) entertains herself in the arms of other men. In turn, Gorman uses his animals to kill these men. When a New York City zoo suggests a fundraising gala, Gorman sees a prime opportunity to dispatch the dashing Roger (John Lodge) and anyone else who might cross him. Can a reptile expert (Randolph Scott) stop the doctor's murderous ways?