Plot
On November 22, 1963, CIA officer Vincent Rambaldi commits suicide after his family is murdered an hour after President John F. Kennedy's assassination.
A year earlier, KGB Colonel Semyon Strogov is questioned by his superior about his first meeting with Rambaldi. In 1943, Strogov had infiltrated Bergenhus Castle in Norway, occupied by Waffen-SS forces conducting experiments to develop a "super-soldier serum", and eliminated German scientist Dr. Hans Heinrich and his handler, SS commander Martin Fichtner. While escaping, he found Rambaldi held captive in an underground cell. After agreeing to swap documents taken from Heinrich's office in return for his freedom, the two men escaped together.
A year later, Strogov is sent to a hotel in neutral Switzerland to identify and kill a mole in Soviet intelligence and retrieve stolen information from Paolo Minelli, an Italian diplomat and Abwehr contact. Upon finishing the mission, he discovers Rambaldi outside and learns that he also sought the documents but was misled by a captured Soviet operative about where Minelli was staying. The two are ambushed by Gestapo agents monitoring the hotel, and are forced to fight their way out. Afterwards, Strogov secretly shares the intel with Rambaldi. Their paths cross again when Strogov is assigned to a joint operation with the OSS. Strogov, with Rambaldi's assistance, assassinates Dr. Berthold Stoltz and his assistant Adolf Krause, both key members of the "Uranium Project", in a secret underground facility beneath Salzburg, Austria. On his way out, he is discovered by German soldiers, but Rambaldi's partner, Andrew Pearson, rescues him when he's held at gunpoint.
In October 1963, Strogov and his collaboration with Rambaldi is fully reviewed by his superior and a fellow agent, KGB Lieutenant Vera Pavlova. Strogov and Vera, posing as a married couple, travel to New York and make contact with Rambaldi, who is working on exposing an anti-government conspiracy within the CIA to trigger a war between the United States and the Soviet Union. Given the code-name "Alekhine", Strogov is informed that no government official or intelligence agency should learn about his mission, otherwise he and Vera will be disavowed. Vera and Strogov rendezvous with Rambaldi, who takes them to his safe house, where he and Pearson have put together a small team of trustworthy CIA agents.
Rambaldi explains to Strogov that the conspirators are working with the Mafia to sabotage American bases and defense assets. He requests that Strogov go to the Red Dragon, a social club in New York's Chinatown, where mafia soldier Paul Capello and CIA analyst Terrence Shaw are meeting to review details of the operation. Strogov sneaks in, assassinates the targets, and obtains Capello's plans. His next mission takes him to the headquarters of a biker gang in Texas, as their president, Alejandro Vargas, is a longtime CIA informant suspected of abducting a reporter investigating his gang. Strogov goes to Texas and discovers that the reporter was tortured to death. He eliminates Vargas's second-in-command Phil Munson, abducts Vargas himself, and brings him to Rambaldi. Vargas discloses the existence of training camps for preparing soldiers, but Pearson accidentally kills him in interrogation before he can reveal anything else.
Strogov goes to Miami, where he kills the boss and consigliere of the Cataldo crime family, both of whom are involved in the conspiracy, while framing their rivals for the murders. Rambaldi identifies one of the camps, located just off the coast of Miami, and has Vera drive Strogov to its location, where he kills the commandant and plants tracking devices on the ships. Strogov finds that he is growing closer to Vera, who asks him to retire from the KGB after their mission is complete. Having learned that Rambaldi also intends to retire to spend more time with his family, Strogov seriously considers the possibility.
A second camp, located near Cuba, is dismantled by the Cuban military after Strogov sends them a transmission from the camp's radio, kills the officer in charge, and steals sensitive documents. When he returns to find Vera, he discovers her on the verge of death, learning that the group has been betrayed. Vera dies, but not before urging Strogov to finish their mission. Forced to act alone, Strogov foils a plot by Cuban saboteurs and a disgruntled Navy captain to blow up an aircraft carrier and frame the Soviets. A few hours later, President Kennedy is killed, followed by the murder of Rambaldi's family and his suicide. Strogov finds a memo left to him by Rambaldi, deducing that Pearson is the traitor. Having anticipated this, Pearson has Strogov arrested in New York, having already contacted both the CIA and the FBI to frame him for the deaths of Rambaldi's team.
Strogov breaks out of custody, steals back the evidence against him from police lockup, and abducts Pearson to question him. Pearson reveals that the two primary leaders of the conspiracy are Admiral Bruce Gardner, a senior Kennedy administration official, and an unnamed German man with ties to the Department of Defense. Strogov kills Pearson and locates the conspiracy's leaders, who have taken refuge in a high-security military bunker in an undisclosed location to finalize their plans.
Strogov infiltrates the base, assassinates Gardner, and finds the office of the unnamed German. Stepping inside, he is held at gunpoint by the man, who turns out to be a former high-level Nazi officer who once ran the Bergen operation that Strogov dismantled in 1943. The latter explains that after the surrender of Germany, he deliberately surrendered to the Americans and was recruited as an American asset to work in intelligence. He used this position to resurrect his primary goal of bringing about a new world order by manipulating the United States into declaring war on Communism. Strogov kills him and exposes the conspiracy to the CIA, who arrest the other top conspirators. Vice President Lyndon B. Johnson assumes Kennedy's office and seeks a new peace with the Soviet Union.
In 1964, a retired Strogov visits Vincent Rambaldi's grave, pays his homage, salutes as a fellow soldier, and quietly walks away.
