A week has passed since Charly Hendricks was fatally stabbed in her home and the killer is still at large. Only one team of rookie detectives remain on the case and they are closing in on the potential murderer. Having turned their attention to the victim's past, they have been able to cross off a number of suspects and their focus is now on two people. Arresting both of them, they hope they can break them down in interview. Can they convince one of them to admit their guilt - and in the process win the £50,000 reward?