Canadian World War II veteran John Graham works in London as a code breaker. Tragedy strikes when his pregnant wife, Carol, is accidentally run over by two crooks who are speeding away from the scene of a murder. Haunted, grieving, and thirsting for revenge, Graham sets out to find the two fugitive murderers.

• Hammer Film Productions
• Robert Preston
• Elizabeth Sellars
• Colin Tapley
• Sheila Burrell
• Harold Lang
• Mary Germaine
• Stanley Baker
• Edith Sharpe