The life of Al Roberts, a pianist in a New York nightclub, turns into a nightmare when he decides to hitchhike to Los Angeles to visit his girlfriend.

A lawyer who is planning to run for District Attorney accidentally kills a gangster who owns the nightclub where the attorney's girlfriend is a singer. Although he manages to cover up his involvement in the crime, his girlfriend discovers the body and is subsequently charged with the murder.

Convinced that she has what it takes to be a detective, inquisitive secretary Kitty O'Day gets her chance to put her sleuthing skills to the test when her investment broker boss is mysteriously murdered. But Kitty's investigation hits a snag when Inspector Miles Clancy begins to suspect that she's the culprit.

Sunset Carson is trying to raise money for a new school and his partner Sam Webster is out to stop him. When Carson plans a benefit prize-fight, Webster plans to make off with the proceeds.

The Three Mesquiteers are forced to track down a train robbery ring after some of the gang hijack their truck for a getaway and the police conclude they are part of the gang, an identification which is just fine with the gang's nameless chief.

A condemned inmate's premature death places officials under suspicion.

Two friends take jobs as truck drivers, unaware that the trucking company is being targeted by a gang of saboteurs who will stop at nothing, including murder, to stop them.

Army training Sgt. Gray makes a bet that he can get himself invited to breakfast with his commanding officer, General Markley. But he gets into an unhappy tangle with a couple of enemy spies (and a happy tangle with the general's daughter) before the bet is finally decided.

A music professor is fired from his job for not knowing enough about modern "swing" music. He goes to Chicago to learn more about the subject in hopes of getting his job back, but he winds up getting mixed up with gangsters.

A young, newly-appointed rookie state trooper, John Shields, is celebrating with his sister Jane, his younger brother Freddie and Tom Marlin, Jane's fiancé and also a trooper, when they hear over the radio that two bandits have just killed a lawyer and his watchman. John and Tom set out in their patrol cars in hopes of capturing the killers, followed by Freddie who hopes some day to qualify as a trooper. Freddie encounters the two two bandits, Spike Doland and Butch and manages to get away with the bag of gold they had stolen. While chasing Freddie they are recognized by John who they kill when he tries to arrest them. Freddie then takes matters into his own hands in seeking to capture the killers of his brother.