Kelly is a detective who is called in on a strange murder case. The dead man has a piece of leopard skin in his hand. Later at the club he sees Shields, a desperate character. He follows the man and sees him meet the Leopard Lady, an actress, and overhears an appointment that they make. Later he gets in the home of the actress and accuses her of the murder. She says that Shields is the guilty man. The next day Kelly is caught by Shields's gang and taken to the den of some ferocious lions that he keeps for such occasions. But the actress is warned and arrives in time to save the detective from his horrible fate by shooting the lion just as the tragedy is about to take place. Then she sails away in an airship and leaves the detective madly in love with her.