17 parts Ongoing Mature1940s London, during World War II, with a backdrop of smoky jazz clubs, blacked-out streets, and an air of constant tension.
Charlotte Hart, a sharp-witted secretary working in the British War Office, is leading a dangerous double life. While outwardly loyal to the Crown, she's secretly acting as a double agent, feeding misinformation to German spies. Her mission is sanctioned, but her loyalty to her country is not without its cracks-she's doing this as part of a covert deal to save her estranged brother, who was captured and branded a traitor.
When her superiors assign her to gain the trust of a dashing yet gruff intelligence officer, Major Alexander Pierce, Charlotte's carefully constructed web of lies begins to unravel. Alexander is suspicious of everyone, especially Charlotte, and seems intent on keeping her under his watchful eye. What begins as a dangerous game of cat and mouse turns into an unexpected romance, forcing Charlotte to question her loyalties, her mission, and her own heart.