This crime drama finds American agent Novak (Yul Brynner) sent to Scotland Yard to help uncover a gang of forgers, murderers and counterfeiters. Even when the British agent Thompson (Edward Woodward) is assigned to help, Novak still remains suspicious of everyone. From Liverpool, the duo traces the Owl (Charles Gray) to London where they hope to meet up with the mysterious gang leader Mr. Big. Novak eventually trusts Thompson as the two close in on the gang that is raking in millions with their illegal activities.
~ Dan Pavlides, All Movie Guide