Unknown, alone, and fearing for your life: as PC Lucy Clayburn is about to find out, going undercover is the most dangerous work there is.
But, on the trail of a prolific female serial killer, there's no other option – and these murders are as brutal as they come.
Lucy must step into the line of fire – a stranger in a criminal underworld that butchers anyone who crosses the line.
And, unknown to Lucy, she's already treading it…
As a female cop walking the mean streets of Manchester, life can be tough for DC Lucy Clayburn. But when one of the North West’s toughest gangsters is your father, things can be particularly difficult.
When Lucy's patch is gripped by a spate of murder-robberies, the police are quick to action. Yet when it transpires that the targets are Manchester’s criminal underworld, attitudes change.
Lucy is soon faced with one of the toughest cases of her life – and one which will prove once and for all whether blood really is thicker than water…