To the distress of his family, Clem Hawley, retired from his garage business, spends his time and money in the company of Al, the local bootlegger.

Fred Colgate, wealthy young man, learns that his tramp wife has been unfaithful and leaves her, and goes to Mexico. An accident causes him to be thought dead. He becomes a prizefighter, and when he return to his home city, he encounters a strange situation.

In the year 1914: The assistants of cobbler Lehmann compete for the affections of his daughter Frieda. Actually she’s in love with her ambitious cousin Fritz, but the cunning Franz knows how to string her along. When Fritz gets drafted, Frieda gives in and marries Franz. Soon Fritz is declared missing and the old cobbler dies of grief. Along the way Franz, who dodged the military service, earns his money with large-scale racketeering. Frieda is miserable. But then Fritz returns from Soviet captivity, prompting Frieda to divorce Franz. Finally Frieda accepts an inheritance from the USA and marries Fritz. With the money they open up a shoe store.

A prospector is murdered by The Cactus Kid and his gang, who hope to find the murdered man's goldmine. The miner's dog, Rin-Tin-Tin, recognizes the killers, who thereafter seek to use the dog to locate the lost mine. With the help of a government agent and a young girl, Rinty saves the mine and brings the bad guys to justice.

John Moore, a young sea captain has a romance with Kay Wheeler, daughter of a trusted trader, "Pop" Wheeler, on a Pacific island. He also acquire the enmity of "Shanghai" Morgan, a notorious sea captain who shanghais his crew and his women.

Paul Andrews returns from the World War with Buddy, a dog he found in Europe. Instead of getting a warm welcome, he finds his sweetheart, Caroline Blair, missing.

Slasher falls off the train that is carrying him. He is found, broken in spirit, by Donald Cass. The dog is regenerated by Donald's love.

When Rin-Tin-Tin's master is found murdered, Rinty is accused of the crime.

A giant condor decimates a herd of sheep, and Rin-Tin-Tin is accused of having turned killer.