U.S. secret agent Peter Novak has been given a dangerous assignment: he is to find out in London who is circulating a lot of counterfeit money worldwide and at the same time has a series of related murders on his conscience. Under suspicion is a crime syndicate whose head nobody knows. In the British capital, Novak contacts Peter Thompson from Scotland Yard. Together with him, he allows himself to be infiltrated into the suspicious gang. This way of unmasking the mysterious backer turns out to be extremely risky and life-threatening...
Exciting agent film in a coolly objective production, which also attaches importance to the characterization of the characters. In the leading role as an intrepid undercover agent acts masterfully the great Yul Brunner, who again spices up the gripping story and leaves a lasting impression with his character head. Both in front of and behind the camera acted numerous professionals, so that this spy thriller under the direction of Sam Wanamaker advances to an incomparable thriller.