Directed by B. Reeves Eason, Armand Schaefer | Starring: Ben Turpin, Rin Tin Tin Jr., Rex, Bob Custer

Rex, a wild stallion, and Rinty, a police dog, are pals. Their master , John Sheldon, is framed for murder, and Alice Ingram plans to race Rex for money to pay for John's legal defense. Meantime, Frank Nolan, who has falsely accused John, sets out to steal Rex for himself.