A dynamic high-flying city lawyer, Bryony Willis, receives a note to say that her terrorist father was not accidentally killed by his own bomb in 1982 but was actually murdered by the police. The UCOS team interviews Bryony's mother, who raised her on Greenham Common, and stumbles upon a dangerous, high-powered police cover-up. Sasha's ex-husband Ned tries to win her back. Is she tempted? Or has too much water passed under the bridge?