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 trio of American crooks board a ship bound for Europe, intending to get rid of $100,000 in stolen dough. With detective John Wade breathing down their necks, the crooks stash the loot in the trunk belonging to vacationing schoolmarm Mary Smith.
Postal inspectors track down money stolen from a railroad car.
