The merciless, supposedly deceased cop Matt Cordell strikes again. The New York police still refuse to accept that the "Maniac Cop" is still alive. In the criminal streets of the Big Apple, he finds a like-minded sex killer who helps him with his crimes. A brutal series of murders begins, and the residents of New York are shocked. It seems that the ruthless killer is a police officer who repeatedly acts at night, insidiously and with unusual brutality. The investigating officers are faced with a mystery, because there is no trace of the killer. Panic soon breaks out in New York. The main suspect is the young police officer Jack Forrest, who was involved in the murders through unfortunate coincidences. Together with his girlfriend, he tries desperately to prove his innocence. Only the fearless police officer McKinney dares to fight against the "schizo duo" and their machinations...