An unexpected discovery pushes a vengeful, battle-hardened soldier into tracking down a charismatic movie star — the man he suspects of having a secret, whirlwind romance with his wife.
In the second season, which has just started production, Knightley’s Helen is still betraying her nation’s secrets to the Black Doves. But after the misadventures of last Christmas, and with her husband Wallace (Buchan), preparing to become Prime Minister, she is walking a more treacherous line than ever.