This specialist group is headed by hugely experienced Detective Inspector David Bradford (Hugo Speer). He's supported by ambitious Detective Sergeant Vivienne Cole (Sharon Small), seasoned crime-solver Detective Constable Rob Brady (Bailey Patrick) and warm-hearted Trainee Detective Constable Billie Fitzgerald (Tori Allen-Martin).
As the detectives get to the heart of each case - skeletal remains dug up in the garden of a student house, the brutal murder of a pub landlord, a teenage au pair found dead in a very compromising position, the double-shooting of a father and son - the one mystery David still can't solve is the one most personal to him. Where is his wife?