The inventor of a new top-of-the-line burglar alarm system is kidnapped by a gang in order to get him to help them commit robberies.

A charming but ruthless criminal holds the family of a bank manager hostage as part of a cold-blooded plan to steal 97,000 pounds.

Seeking to avoid arrest while fleeing through a city park at night, two jewel thieves, Gordon and young Tommy, stash some just-stolen jewels on elderly, unknowing Martha Abbott. They then invite Martha to come live with them as their housekeeper, duping her into helping fence their goods. When Martha eventually becomes aware of the criminal activities, she strives to help Tommy reform.

In this MGM "Crime Does Not Pay" series short, a radio and television engineer falls into a life of crime by dismantling alarms for robberies.