A fur trapper catches another trapper trying to steal his furs. He stops the thief, but later on the furs are stolen anyway. Rin Tin Tin Jr. tracks down the thief to try to get the furs back.

An unhappy child, accompanied by his dog, runs away from home and is befriended by a gangster on the lam.

Starting in 1913 movie director Connors discovers singer Molly Adair. As she becomes a star she marries an actor, so Connors fires them. She asks for him as director of her next film. Many silent stars shown making the transition to sound.

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.

Rin-Tin-Tin brings the killer of his mistress to justice.

When a man is wrongly accused of murder, a dog helps clear his name.

An unhappy child, accompanied by his dog, runs away from home and is befriended by a gangster on the lam.