The gun violence of a turf war spills out onto the packed streets of Camden.
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.