A crazed mass murderer is terrorizing New York, his victims the target of a strange and deadly form of Oriental blood sacrifice. Detective Sergeant Decker, a cop with a potent understanding of the martial arts, is put on the killer's trail. At once he is enmeshed in a network of betrayal and murderous deception that stretches from Saigon's serpentine alleyways to Manhattan's diamond markets to the vast, seething underworld of Paris.