Heute blau und morgen blau

Second Jerry Cotton movie. A ring of gangsters has been terrorizing New York City. Special agent Jerry Cotton is summoned by the FBI to help crack down on the Criminals and put them out of business. He doesnt pull any punches either.

An Australian woman arrives in London to search for her sister who she finds is involved with a heroin smuggling gang. The gang itself is under attack from an unknown rival, who is methodically assassinating them with a shot to the head.

The starting point of the plot is a Men's club, which serves both as a meeting place as well as an alibi by unfaithful husbands. Interspersed between the sex scenes are reporters' questions on alleged passersby about marital fidelity and infidelity.

When private detective Bob Martin looking for a stolen diamond necklace, he also has a clever serial killer on the trail ...