 Bill Rogers, an American pilot taking special training in the States, gets an unauthorized hop to England to pay a surprise visit his beautiful Norwegian wife. He is devastated when he finds that she has moved out of their flat and is living a new and glamorous lifestyle entertaining a lot of men. After being knocked unconscious by an unseen assailant in her upscale West End apartment, he awakens to find his wife shot to death with his service pistol. On the run from police he persuades a young woman who runs a Salvation Army soup kitchen to believe in his innocence and help him uncover the real culprit. Although the police do not know as yet that he is in Britain, he has just 36 hours before he is declared AWOL and his identity is exposed. The trail leads to a corrupt customs official, smuggling, blackmail, and a mysterious safety deposit box.