A story about a singer/showgirl who poses as a nurse to recover some stolen paintings, which for some reason are hidden in a military insane asylum.

Inspector Betti (Maurizio Merli) is transferred to Naples and immediately after his arrival receives a warm welcome from The Commandante (Barry Sullivan), the city's crime lord. Betti then goes on a personal mission against corruption and organized crime, and tries to force the syndicate out of town with any means necessary.