A saloon owner falls in love with the abused wife of a heavy gambler. He is snared into a web of intrigue when an ex-girlfriend is found murdered in his apartment.

From the case files of Scotland Yard, detectives investigate the mysterious death of Peter Adams, artist and possible forger.

When Scotland Yard detectives investigate the murder of a man in the London airport, the trail leads to Lisbon and a international currency smuggling gang.

A Scotland Yard ballistics expert is called into identify a murderer through a scientific analysis of the bullet that killed a man.