A blind man's sight is restored in time to solve the mystery of his girlfriend's dead (or is he) brother and a gang of currency smugglers.

A man suffering from temporary blindness accidentally walks into a house where a murder has just occurred. The killers, realizing he's blind, decide not to kill him but just knock him out and leave him out on the street. When the police find him they don't believe his story because they can't find a body. After he regains his sight he sets out to find the body and the killers, and runs into a woman who is looking for her missing brother, who may or may not be the murder victim.—[email protected]

Maxwell Reed stars as Chris Pelley, a blind ex-serviceman who is driven to the wrong address when he arrives in London and finds a corpse and a man's ring nearby. The three killers are still in the house but when they realise that he is blind, simply knock him out and put him out on the street. The police find him, after a simple bonk on the bonce, but don't believe him because they cannot find the body. Then, after his sight is miraculously restored by an operation, he sets off to find the body and the killers. He returns to the house to find kindly Pat Dale (Dinah Sheridan) living there with her father and a photo on the piano tells him the ring belongs to her brother, Norman (Basil Appleby), presumed dead after a plane crash a year ago. Pat agrees to help him investigate the mystery, and with handy aid from her and Norman's friend Chalky (Patric Doonan), he busts a smuggling gang.