When mother and carer Lia Brown is killed by a stray bullet, the team struggle to understand the involvement of 12-year-old Kaden Blake in the shooting. Kaden is caught up in the local gang culture, and keeping silent is his only protection. DS Matt Devlin is drawn to this damaged boy, saddened to see a life so doomed by circumstance and furious that local dealer and gang leader Mark Ellis remains untouchable by the law. Matt forces the hands of the crown prosecutors to move Ellis into the frame for Lia's death. Despite the gang culture of intimidation and silence, Kaden finds the courage to speak out - but in doing so, he sets in motion a shattering chain of events.