On her first day back in uniform, Sgt June Ackland finds a man brutally stabbed in the house of prominent CPS prosecutor Carl Harris. Arresting Harris for GBH, they find back at the station that Supt Adam Okaro has some history with him - Harris threw out an assault case Okaro had worked on, and Okaro suspects he is corrupt. Harris's daughter Natasha stays quiet, and it is clear she knows more than she is letting on. Acting DI Samantha Nixon investigates a fraud case Carl Harris was prosecuting, but Ackland convinces Natasha to reveal the truth - the victim was her biological father, and had been blackmailing Carl. PC Cameron Tait takes desperate action when he thinks his daughter Emily might be in danger from her mother's boyfriend, Mark Davies. When Davies ends up in hospital after a mysterious assault, PC Gary Best looks on in horror as Tait bundles Emily into a minicab and speeds away...