Experience one of the most explosive periods of history--the English Civil War--through the eyes of a passionate young girl who exploits a country in crisis in order to survive. Seventeen-year-old Angelica Fanshawe (Andrea Riseborough, Magicians) abandons her loyalty to the Royal Family following the execution of her childhood sweetheart and first husband. Left destitute and desperate, Angelica turns to the despairing recourse of prostitution and armed robbery to make a living--taking lover upon lover along the way. After marrying the heroic revolutionary Rainsborough (Michael Fassbender, 300), Angelica befriends the notorious military leader Oliver Cromwell (Dominic West, The Wire), eager to become his most intimate confidante, just as he embarks on his reign as Lord Protector England. She soon flees, however, feeling betrayed when Cromwell murders her husband in an attempt to remain in power. With accusations of slander hanging over her, Angelica narrowly escapes death in the gallows and promptly marries again, this time to her savior, the enigmatic mercenary Sexby (John Simm, Life on Mars). Driven mad by his love for her, he attempts a suicidal mission--the assassination of Cromwell. Caught in a web of deceit and betrayal, Angelica must fend for herself and her child, fleeing the country before her past catches up with her. On this bold journey of the heart and mind, Angelica evolves from a girl of resourceful innocence to a bold and empowered woman of hard-earned political and emotional appreciation of what is at stake--for her, for her country, and for the future. An ingenious blend of fact and fiction, The Devil's Mistress is a sumptuously rich miniseries event of love, betrayal, and renewal, set in a time when yesterday's lovers could suddenly become tomorrow's enemies.