Two best friends. One terrible event. Abdi Mahal and Noah Sadler have been inseparable since they met.

They've stuck together, even when their peers have excluded them. But when a horrifying incident leaves Noah in a coma and fighting for his life, Abdi is too traumatised to say anything about what happened. DI Jim Clemo, freshly returned to work after an enforced leave of absence, is tasked to investigate.

And against a backdrop of a city where racial tensions are running high, he must determine what really happened to drive two teenage boys into a situation so desperate. Everything rests on one of the boys talking. But one can't talk.

And one won't.