|Sgt. Matt Boyden of The Bill and an unidentified black man are both murdered in a drive-by shooting. The gunman makes a speedy getaway leaving the police with no idea which man was the intended target. Matt's copper colleagues look on, devastated, as M.I.T comb the crime scene. Meanwhile his own drug addicted daughter, Amy, hears the news from a custody cell back at the nick. Still in shock, evidence collected from his daughter and colleagues lead MIT to discover Matt wasn't always on the right side of the law. Sure he may have had a few skeletons in his closet, but did anyone hold a killer grudge? The investigation takes a surprising turn when D.I. Samantha Nixon is brought in for questioning - her underage daughter has been involved with Boyden and she is now a major suspect in the murder enquiry. But until the second victim can be identified D.I. Vivien Friend knows she is only working with half an investigation...