When a fire at his home leads to the death of a teenager with severe disabilities - DS Devlin and DS Brooks soon discover the fire was no accident. The investigation draws our cops in many different directions, but the finger of blame soon points towards the last person anyone would have expected. Complications develop in prosecuting the defendant when the CPS find themselves up against 'win-at-all-costs' defence lawyer Dominic Peck whose outrageous ego threatens the fair outcome of the trial. With Peck constantly shifting the goalposts and misinforming his client, James finds himself acting as both defence and prosecution.

The body of a missing child is found with a note reading 'They Must be Destroyed' - a terrifying echo for DS Brooks of an old case in which he was involved. Andrew Dillon - an out and out racist - was convicted six years ago of killing three young boys in similar circumstances. With Dillon safely locked up in prison, it looks like there may be a copycat killer picking up where Dillon left off. Or could there be an alternative and more terrifying truth?