Some secrets are buried deep. Others are dug up with blood.

In the early hours on a quiet North Yorkshire lane, a devastating incident sends shock waves through Harrogate Police. Detective Chief Inspector Rosie Marks – ‘Yorkshire Rosie’ to the locals who trust her and the criminals who fear her – is thrust back into the fight before she’s even had time to breathe.

A ruthless new London crew has muscled into the county lines trade, turning Rosie’s patch into a battleground. Their arrival forces Manchester crime boss Brian Hazell into a deadly corner: retreat from Yorkshire… or go to war for it.

As Rosie leads Operation Caterpillar, violence erupts across the region and bodies begin to fall. But the worst threat doesn’t come from the streets—it comes from inside the station walls.

Someone within Harrogate Police is feeding information straight to Hazell, sabotaging investigations and putting officers’ lives at risk. With trust crumbling and the stakes rising, Rosie must unmask the mole before more blood is spilled.

Because if she fails, more shallow graves will be dug—and this time, the victims might be closer than she ever imagined.

Perfect for fans of LJ Ross, Ann Cleeves, and MW Craven.