Kate O'Donnell and her police sergeant partner, Harry Barnard enter dangerous waters when they uncover evidence of a top-level conspiracy. On a busy Friday night in 1964, a woman's partially clothed body is discovered in London's Soho Square. She has been raped and strangled. With no one reported missing, her identity remains a mystery. Assuming the victim to be a prostitute, DCI Jackson is inclined to dismiss the case. Detective Sergeant Harry Barnard disagrees. Harry's partner Kate meanwhile has been despatched to her native Liverpool to work on a magazine feature about the city's remarkable regeneration, timed to coincide with the release of the Beatles' movie, A Hard Day's Night. As Harry's investigations point to evidence of a cover-up at the highest level, Kate's assignment leads her to uncover a darker side to 1960s' Liverpool - and a possible link to the Soho murder victim. Are she and Harry getting into something too deep and dangerous for them to handle?