Secretary Joyce Willecombe grows suspicious of two men boarding her train and is referred to 'Tough Willy' Calhoun, head of the Union Station police. The all-seeing, no-nonsense Calhoun is initially skeptical, but the men (who escape) prove to be involved in a kidnap case. Calhoun calls in equally tough police Inspector Donnelly, but the ruthless kidnapper's precision planning stays one jump ahead of them. Most of the action centers around bustling Union Station.