When a farmer and his son go missing whilst chasing thieves, DCI Evan Warlow and his team are called in to investigate.

Everything points to a botched raid by rustlers, but with no bodies, and little or no clues, the team quickly start chasing their tails. But even a hardened pro like Warlow isn’t prepared for the monstrous truth when, like a rabid sheepdog, it finally sits up and bites him on the leg.