Naval commander Charles Sturm has made life miserable for his wife Diana due to his insane jealousy over every man she speaks to. His obsessive behavior soon drives her to the arms of a handsome lieutenant. When Charles learns of their affair, he plots revenge.

Driven to desperation by his young and extravagant wife, alienist Dr. Emil Brandt has arranged a perfect crime; now he begs the police to lock him up before he can commit it.

Ace reporter Curt Devlin and fellow reporter Ellen Garfield love one another, but Curt believes women are "bum newspapermen". When a murder investigation ensues, the two compete every step of the way, determined to not be scooped by the other.

In a spooky hotel on the coast of France, two bands of crooks are working independently of the other in an attempt to steal the inherited fortune of an American girl, Sue Tally. Along the way the heiress is kidnapped, three murders are committed, a girl appears in two places at once, mysterious persons roam about the old hotel at night and mysteriously disappear, and there is a hidden room without any doors.

A former government agent in France, who has failed at an assignment and been disavowed, is deported back to the USA, where he can only find work at a low-rent detective agency. He soon gets involved with a woman with ties to a crooked gambling club owner, who is a client of his agency.

A very nervous man named Cartwright comes into Perry's office to have the neighbor arrested for his howling dog. He states that the howling is a sign that there is a death in the neighborhood. He also wants a will written giving his estate to the lady living at the neighbors house. It is all very mysterious and by the next day, his will is changed and Cartwright is missing, as is the lady of the house next door. Perry has a will and a retainer and must find out whether he has a client or a beneficiary.