Writer Kenneth Magee has bet that he can finish a story at rural resort Baldpate Inn, now closed for the winter. The owner has given him the "only" key to the front door. But there are six other keys, and peculiar characters, some of them up to no good, keep turning up as the mystery deepens.

An ex-gambler helps a beautiful widow, and becomes involved with a murder, secret agents, and saboteurs.

A Newfoundland fishingboat comes to the aid of a wrecked Danish sailing ship and tows it to a small village, but eventually the captain of the fishingboat realises that it's a U-boat supply ship in disguise, loaded with torpedoes. So, together with his crew and a group of villagers he sets about a plan to blow the ship as well as any U-boats that approach it. Based on the novel "The Gaunt Woman" by Edmund Gilligan.

Having forsaken the detective business for the safer confines of personal insurance, Gay Laurence is compelled to return to his sleuthing ways. Along with sidekick Jonathan "Goldie" Locke, he agrees to look into a series of home party robberies that have victimized socialite Maxine Wood. The duo gets more than they bargained for when a murder is committed at Wood's home, but Lawrence still finds time to romance the damsel.

A husband clashes with his wife over his membership to the Irish citizen army during the Easter rebellion.

In Singapore, a private detective and the British authorities are on the trail of a crime syndicate that kidnaps a nuclear physicist with the aim of selling him to the highest bidder.

A young woman discovers she is the daughter of the infamous Dr. Jekyll, and begins to believe that she may also have a split personality, one of whom is a ruthless killer.

Opportunistic con man Dan Kehoe ingratiates himself with the cantankerous mother of four outlaws and their beautiful widows in order to find their hidden gold.

When a teacher reads an essay written by Morgan Evans, one of the boys, moved by his rough poetry she decides to hold classes in her house and believes that Morgan is smart enough to attend Oxford.

After an innocent man is executed in a case he was responsible for, a Scotland Yard superintendent finds himself investigating the murder of his key witness.