Saigon

In Saigon, during the Vietnam war, Buck McGriff and Albaby Perkins are U.S. Military Policemen trying to do law enforcement in a chaotic city. When a prostitute is executed in bed, they investigate and they find a witness - the G.I. Maurice that is scared since the killer is an American officer. However Maurice is murdered and soon they find that there are six other prostitutes that have been murdered but their cases have vanished from the files. They meet the former investigator that gives a copy of his findings and they have five colonels as prime suspects that might be the serial-killer, but their friend Sargeant Dix warns that only three of them were in Saigon in the night of the last murder. McGriff finds that Sister Nicole has a witness hidden in the jungle with the Vietcong and he tries to convince her to let them meet her to find who the serial-killer is.