What started in the playground will finish in blood.
When a tragic farm accident turns out to be foul play, DCI Harry Grimm finds himself up against a murderer years in the making and out for revenge.
With the local community in self-imposed lock down, and the body count quickly climbing, Harry and his team are in a race against time to stop a killer as invisible as they are brutally effective.
But with some threatening to take the law into their own hands, and the wounds of his own past once again starting to bleed, DCI Harry Grimm is about to take a trip into Hell.
And beyond.