April 1971. When DI Webb and DS Raymond receive an emergency call, a horrific scene awaits them. Susan Lang is lying on the ground, bleeding to death. Her husband Henry is sitting nearby, holding a large, blood-stained knife. In shock, Henry claims to have no memory of the events that led to his wife's death, leaving his barrister, Ben Schroeder, little to defend a potential charge of murder. Meanwhile, unknown to his strict Baptist wife Deborah, Mr Justice Conrad Rainer has a secret life as a highstakes gambler...