Horst Buchholz plays a Polish sailor who comes ashore to find his beloved has spurned him. Hayley Mills is the young girl living downstairs who witnesses their quarrelling. John Mills is the police superintendent on the sailor's tail.
With Hayley Mills, Horst Buchholz, John Mills, Yvonne Mitchell. A 12 year old tomboy witnesses the murder of a woman by her Polish merchant marine boyfriend but bonds with him and thwarts the police in their investigation.