Eddie Boys is a suspect in a factory robbery, but he has a seemingly cast iron alibi- he was with Regan.Regan takes matters into his own hands and sokn faces charges of harasement.

Crime boss Johnny Lyon and his two associates walk free from a murder trial.Regan is given a free hand to put them behind bars for good...and quickly.

Regan's lady-friends car is stolen.In it is photos and notes from Regans surveillance of gangster Frank Kemble.Soon the photos get into Kemble's hands

When the body of a member of Scotland Yard's elite 'flying squad' is found brutally murdered in the Thames near docklands, fellow squad member Jack Regan investigates. The dead officer had been on the trail of local gangs, and Regan goes out on a limb and breaks rules in his desperation to learn the truth.