Washington, DC, 1975. Evgeny 'Gene' Tsipin visits his terminally-ill father and double agent Philby in Moskow. Soviet embassy 'political attaché' Sergei Kukushkin, a KGB captain, defects, claiming he has to seize the time window of the KGB Washington mole 'Sasha'. Mother believes his indications and starts ruthlessly interrogating as mole suspect Leo Kretsky, who keeps denying. Kukushkin is snatched back by the Soviets, who hold his family.