Black Dove is an action drama set in London at Christmastime, telling a poignant and heartfelt story of friendship and sacrifice. The series centers on Helen Webb (Keira Knightley), a witty, pragmatic and dedicated wife and mother, as well as a professional spy. For 10 years, she has been passing on her politician husband’s secrets to the shadowy organization she works for: Black Dove. When her secret lover Jason (Andrew Koji) is assassinated, her spy boss, the mysterious Reed (Sarah Lancashire), assigns her old friend Sam (Ben Whishaw) to protect her. Helen and Sam team up to investigate, trying to find out who killed Jason and what the motives were. Their investigation gradually unravels a vast and intricate conspiracy that links London’s shadowy underworld to a looming geopolitical crisis.