Someone knocked out a man and left him for dead during a fishing trip in Portugal. That someone is either his fetching wife, or two business partners, all sporting guilty faces after his unexpected return. Two more murders and a frame-up befall the quartet before an inspector closes the case.

• Lippert Films
• Hammer Film Productions
• Paulette Goddard
• William Sylvester
• Patrick Holt
• Paul Carpenter
• Alvys Maben
• Russell Napier
• Kay Callard
• David King-Wood