SCORPIO

Cross is an experienced, but retiring Central Intelligence Agency (CIA) agent and assassin who is training freelance hitman Jean Laurier, alias Scorpio, to replace him. Cross is teaching him as much about protecting himself from his patrons and never trusting anyone as how to get away clean.

The CIA tells Scorpio to kill Cross for suspected treason and collaboration with the Soviets, but Cross gets to him first and pays him a large sum of money. Scorpio travels back to the US with Cross, where Cross visits his wife and Laurier visits his sister and girlfriend, who are roommates. The CIA continue to pressure Scorpio into assassinating Cross, but he proves reluctant until the CIA break into his apartment and frame Laurier with a narcotics charge. His only choice is to take the job and terminate Cross. Understanding that the CIA wants him out, Cross flees to Vienna in disguise and reunites with his Soviet opposite and friend, Sergei Zharkov who provides him a safehouse. Scorpio follows Cross' trail to Vienna. Cross intends to bring his wife out from the US and get out of the spy business. Despite blown covers and many failed CIA attempts to ambush him, Cross manages to stay one step ahead of his pursuers.

In a failed break-in at Cross's home, CIA agents shoot and kill his wife Sarah, causing Cross to return to America. He rejects protection from Zharkov, whose agency wants to know secrets he knows as a senior field agent. Zharkov helps Cross to cover his tracks and reach America. Cross evades capture by the CIA and manages to kill McLeod, the agency director responsible for his wife's death. CIA wants Cross' head on a platter and contracts Scorpio again.

The new CIA director and Scorpio's handler Filchock shows him evidence that Cross might have collaborated in the past with other foreign agents and was able to make a hefty sum from it. Following surveillance video of a potential meet up between Cross's wife and accomplice at the Library of Congress, Scorpio sees his girlfriend walking out as well and comes to realization that she is working with Cross.

Enraged by this, Scorpio corners Cross and Susan and kills his girlfriend instantly without remorse. Cross says she was a Czech courier and he is just a middleman between their agency for staying in the game and did not betray Scorpio. Scorpio finishes off Cross after hearing his last words of wisdom. Moments later, Scorpio is also shot by a mysterious assailant, as Cross had earlier predicted.

Scorpio kills Cross after a confrontation, only to be shot by a mysterious assailant moments later, fulfilling Cross's warning.

The ending brings the cycle of betrayal and mistrust full circle: Cross, the teacher, is eliminated by his protégé, but Scorpio himself is quickly disposed of by the unseen powers he serves. The film underscores the expendability of operatives in the espionage world, where loyalty is fleeting and survival is temporary. It leaves no illusions about the costs of the spy game.