During London's swinging sixties, young Jewish Vivien Epstein follows her lover into danger and when he is caught between life and death, she finds herself going undercover with the fascists, not only for him but for the sake of her country.

Agnes O'Casey, Tom Varey, Rory Kinnear, Eddie Marsan, Danny-Boy Hatchard, Rita Tushingham, Gabriel Akuwudike, James Craze, Tamzin Outhwaite, Allan Corduner, Will Keen, Tracy-Ann Oberman, Samantha Spiro, Julia Krynke, Hannah Traylen, Danny Sykes, Hannah Onslow