A Stumped insurance company is forced to re-hire the most expensive, most big-headed, but best arson investigator to solve a string of major losses.

Richard Arlen is the convicted murderer and Adrienne Ames his sister who believes in his innocence. We see the murder and the framing set-up at the beginning of the film, so there’s no mystery for the audience to solve. Just the pleasure of watching an intricate cat-and-mouse game, with the murderer one step ahead of his pursuers until the final, tense confrontation.

The owner of a border town gambling saloon falls in love with a promiscuous young girl. When she has an affair with another, he tosses her out of town. She gets revenge by marrying his younger brother.

Two dumb soda jerks dream of writing radio mysteries. When they try to pitch an idea at a radio station, they end up in the middle of a real murder when the station owner is killed during a broadcast.

Sam Bisbee is an inventor whose works (e.g., a keyhole finder for drunks) have brought him only poverty. His daughter is in love with the son of the town snob. Events conspire to ruin his bullet-proof tire just as success seems near. Another of his inventions prohibits him from committing suicide, so Sam decides to go on living.

A black cat is suspected of being possessed by the spirit of a elderly murdered woman.