When Mrs. Irwin (Joan Barclay), asks Tom Lawrence (Tom Conway), aka the Falcon, to prevent the marriage of her ex-husband, Tex Irwin (Lyle Talbot) to his fiancée, gold digger Vanessa Drake (Carole Gallagher), The Falcon becomes involved in murder. Rich cattle baron Irwin is murdered in a New York City nightclub, dying from the venom of a rattlesnake. When suspicion falls on various members of his family and business associates, The Falcon and the police, led by Police Inspector Timothy Donovan (Cliff Clark) and his assistant, Homicide Detective Bates (Edward Gargan) travel west following Vanessa, to the Irwin ranch in Texas to try and solve the mystery.