In Tiger Bay, the docklands of Cardiff, rough-and-tumble street urchin Gillie witnesses the brutal killing of a young woman at the hands of visiting Polish sailor Korchinsky. Instead of reporting the crime to the authorities, Gillie merely pockets a prize for herself — Korchinsky's shiny black revolver — and flees the scene. When Detective Graham discovers that Gillie has the murder weapon, the fiery young girl weaves a web of lies to throw him off course.

• Independent Artists
• John Mills
• Horst Buchholz
• Hayley Mills
• Yvonne Mitchell
• Megs Jenkins
• Anthony Dawson
• George Selway
• Shari