Ash is closer to the bigger criminals than he has ever been. The Unit has its hooks into an important drug dealer: Xavier. They're following his every move in the hope he'll lead them to someone even higher in the organisation, and ultimately to the man at the very top. They follow Xavier to a meet with a rival dealer in a busy market. Events take a shocking turn when guns are drawn, panic ensues and an innocent boy is killed. (thetvdb.com)