Katya and Alexander were never meant to fall in love but that's exactly what happened. The year was 1959 and the couple were both living in Moscow, Alexander a Soviet politician and Katya a spy for the US. Katya was tasked with infiltrating Alexander's political circle by targeting him. Initially Katya's mission goes to plan but when the couple fall in love, her plan goes awry.
Without any notice, Katya disappears and Alexander is left wondering what's happened. Forced to defect from the U.S.S.R, Alexander starts a new life alone. Thirty years later, his love for the lady he once knew is as strong as ever, now a new discovery might just hold the secret to what happened to his former wife.
Starring: Charles Dance, Rebecca Ferguson, Sam Reid, Antje Traue, Amy Nuttall, Oliver Jackson-Cohen, Anthony Head, Thure Lindhardt, Ben Batt, Milos Timotijevic