After three hippie drug-dealers are murdered by "the assassin" in a house in
Los Angeles, the U.S. government sends special agent Paul Sherman to track down the Dutch source of
heroin that is causing the drug war. On arriving at
Amsterdam Schiphol Airport, Sherman witnesses an agent, Jimmy Duclos, who was there to meet him, shot dead by the assassin. Sherman is originally from the Netherlands, but it is clear that
Amsterdam's chief of police, Colonel De Graaf, is unhappy with having the Americans interfere in Dutch affairs. However, Sherman's direct contact, Inspector Van Gelder, is more cooperative, since his niece, Trudi, suffers from severe brain damage caused by a heroin overdose eight years earlier. Sherman makes contact with a deep-cover agent from Washington named Maggie. Sherman is then followed around Amsterdam by the assassin, indicating that the drug dealers have someone on the inside. Sherman gets away from him and later confronts him in Sherman's hotel room, where Sherman accidentally kills him. Sherman meets Duclos' girlfriend Astrid Lemay and her drug-addicted brother George. Soon after, George dies of an overdose and she is murdered. Sherman is attacked by a man on a boat and shoots him dead. Drug lord Meegeren, who had killed Astrid, then kills Maggie by hanging her from a chain (although in the book she is pitchforked to death by the Dutch women in the courtyard) and holds Sherman prisoner. Meegeren leaves on a speedboat. Sherman escapes and follows him on another speedboat. The chase ends with Meegeren accidentally crashing his boat and it being destroyed by fire. Sherman and a colleague arrive at a warehouse (run by Morgenstern but without his partner Mugenthaler who only appears in the book) where the drugs are being distributed. There he meets Van Gelder and his niece. He finds out that they are part of the trafficking gang and that Trudi had been faking her mental disability. A shootout leaves Trudi dead and Sherman wounded. Van Gelder tries to escape, but is killed by Sherman (again a discrepancy in that he falls to his death in the film but is skewered on a hook in the book). ==Cast==