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.
John Mills
as Superintendent Graham
Horst Buchholz
as Korchinsky
Hayley Mills
as Gillie
Yvonne Mitchell
as Anya
Megs Jenkins
as Mrs. Phillips
Anthony Dawson
as Barclay
George Selway
as Det. Sgt. Harvey
Shari
as Christine
George Pastell
as Poloma Captain
Paul Stassino
as Poloma First Officer
Marne Maitland
as Doctor
Meredith Edwards
as Williams
