Tom Turner, a naturalist, comes to the "Topa Topa" district (named for the mountain), and falls in love with widow Margaret Weston...

A scientist invents a poison gas; the villain and his gang will do anything to get the formula; our hero, "Lightning Hutch", is sent to save the scientist, the scientist's beautiful daughter, and the formula.

To protect a young woman's life, a man pretends to be her injured friend so he can investigate a murder and capture the killers.

When a California mother loses custody of her young son to her ex-husband, she flees with the child to the jungles of Mexico with hopes of starting life anew.

An honest boxer refuses to throw a fight for a gambler. They get into a fight and the boxer knocks the gambler out. Thinking he's killed him and believing that the police are after him, the horrified boxer runs off and takes to the road, promising never to box again. However, one day he comes upon a small but scrappy young kid who has the potential to be a champion. The former boxer takes the kid under his wing and trains him, but the kid's ensuing success starts to go to his head. Pretty soon he finds himself mixed up with gamblers, too.

A deranged killer escapes into the Canadian woods. He tries to fool the locals by pretending he is a well known mystery writer, but the local Mountie starts to get suspicious.

While a ship's captain is being slowly poisoned, a gang of thugs try to take over the ship.

A corrupt politician adopts a young girl. A few years later he finds himself falling in love with her, but discovers that she in turn loves a rich young bachelor.

A team of two-fisted insurance investigators (one of whom disguises himself as The Masked Marvel) endeavor to discover and thwart the loathsome saboteur Sakima.

There is a sensational jewel robbery at the home of one of the leaders of the Boston Back Bay aristocracy, and a Count d'Alencourt is arrested on the basis of a long police record involving jewel thefts and later convicted. The story follows the activities of his accomplices who escape, led by Daniel Treve. Daniel and a gang-member hide out in a small Connecticut town, where Danny marries a local girl, Mary Gate, when her guardians try to railroad her in a reform school when she refuses to marry their son. She is the innocent means by which Danny gets the stolen jewels to New York. Danny tells her he only went through with the marriage to save her, and gives her money to live on until she can obtain a position. He them leaves New York determined to quit the rackets and make himself worthy of her. She then provides the way in which he can.