A melodrama that looks at the legal system that suddenly adds dashes of Perry Mason into the mix. Richard Attenborough plays a local friendly cabbie who gets trick or treated by a gang of kids early in the morning. He goes after them more in jest and later helps one of the girl's looking for her lost doll in the streets of post war London which still was littered with bomb sites
When the young girl is found dead Attenborough turns out to be the wrong man in the wrong place but all the evidence, circumstantial it might be points to him being the murderer. Of course we know it's not him as we see a man in a bowler hat shown in silhouette who approached he girl after Attenborough left the girl and this shadowy man pops up later on. It really wants you to shout out 'its that man again' every time you see him
Attenborough's wife has a hard time to get a criminal solicitor who believes in his innocent, only later a dogged barrister reluctantly turns detective in order to unmask the real culprit
The film has a very realistic location setting of the post war London with kids running about on their own. Even the reluctance of the lawyers to take the case on was very much on the mark. The latter part of the film based on some random circumstances allowing the Barrister to think it the murderer is someone else and nearby is rather convenient but the film just about gets away with it.