An American private investigator (Richard Carlson) arrives in England for a holiday but gets involved in investigating the apparent suicide of a woman. He is helped by one of her friends (Rona Anderson) and suspects Greta Gynt and Herbert Lom were not really so friendly to her as they seem. The plot is suitabley convoluted and there are good performances from Rona ANderson and Greta Gynt as love interest and suspect.