Secretary Joyce Willecombe grows suspicious of two men boarding her train and is referred to 'Tough Willy' Calhoun, head of the 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 .