In the final days of World War II, German teenager Thomas (Tom Schilling) joins his countrymen in repelling the advancing Russian army, only to be captured by the enemy and inducted into life behind the Iron Curtain.

Many years later, Thomas (now played by Ed Stoppard) is recruited by the KGB to infiltrate a Soviet spy ring in London, where his allegiances are tested by a burgeoning romance with a young artist called Yvonne (Michelle Gayle).

ymen in repelling the advancing Russian army, only to be captured by the enemy and inducted into life behind the Iron Curtain.

Many years later, Thomas (now played by Ed Stoppard) is recruited by the KGB to infiltrate a Soviet spy ring in London, where his allegiances are tested by a burgeoning romance with a young artist called Yvonne (Michelle Gayle).