Truck drivers Steve Hackett and Bill Purvis are fired from their jobs with the West Coast Trucking company for not using second-gear going down steep grades. Davis, the company vice-president, surprisingly asks them to carry a load of merchandise to Arrowhead and offers a $1000 bonus. He tells them it is a load of lettuce. Several miles out of Los Angelese, they are stopped by a mob of lettuce-farm workers on strike. When the first crate is tossed off the truck, it explodes and the two pals learn their merchandise is a cargo of dynamite. The workers let them proceed and they crash into a car driven by Mary Stevens, whom they had met at a restaurant. She and her dog, "Butch" (played by a Credited dog named Stooge), join them and they deliver their cargo, and learn unscrupulous real-estate operators have jammed the locks on the dam in order to ruin the ranchers and farmers and take over their property.

Despite her mother's objections, the naive young daughter of a show boat captain is thrust into the limelight as the company's new leading lady.

Life in a small Chinese village is turned upside down when the Japanese invade it. A heroic young Chinese woman leads her fellow villagers in an uprising against the Japanese invaders.

Zara Montalve, half Spanish and half America, returns to her native California in time to see her parents murdered for their hacienda and gold by Sheriff Jim Harding and his gang. Posing as Lola Belmont, an American visiting from Detroit, teams up with Joaquin Murietta, posing as Carlos Del Rio, to form a Robin-Hood type band that takes vengeance on the gang and restores stolen gold to its rightful owners, aided by militia leader Dan Hinsdale.

A singer is involved with two women in his life, one a "good" girl and one a "bad" one."

An Austrian officer must face up to the good and evil aspects of his own personality as he becomes involved in a war.

It's 1860 and the old Spanish land grants are being surveyed. Montez is after part of Don Regas' rancho and gets the surveyor to alter the boundary. But Don Regas still has the original grant written on a bandanna. Montez sends Indians after it but Bill Cody and Gabby fight them off and a wounded Gabby unknowingly ends up with the missing million dollar deed wrapped around his arm for a bandage.

Lora Travers is the only person who can identify hold-up artist The Llano Kid and she persuades him to come in on a scheme with her and her husband. They have been searching for the long-lost son of a rich Mexican widow and they get the Kid to claim it is him. All goes according to plan until greed and jealousy raise their heads.

On her debut as an opera star, Marion Stuart is interrogated and possibly implicated in the death of a male acquaintance. Released, although thoroughly shaken-up, Marion attempts to perform but loses her voice onstage. Humiliated, but driven to sing, she travels to South America under the assumed name of Maria Delasano, and works in an opera company under the tutelage of Feodor Glinka, who wants her to shun men and save herself for her art. Mary resists the persistent attentions of wealthy young Phil Roberts, who follows the company in hopes of marrying her. ...

A detective is hired to protect the life of a singer, who has recently inherited a department store, from the store's crooked manager.