A brutal killer who strangles young women and leaves their bodies strewn across London's parks. A killer who leaves his next victim's shoe beside the body of his last one. Detective Jack MacIntosh has seven days to find the truth.

A young woman's body is discovered in Hyde Park. Wearing only one shoe.

Close to the body, Detective Jack MacIntosh finds a black stiletto, diamante buckle glinting in the early morning sun. But it doesn't belong to the victim.

Two days later, another young woman is found strangled to death in nearby Green Park. Wearing just one shoe - the matching stiletto. Hidden in the long grass beside the body, the police uncover a low-heeled court shoe.

Detective Jack and his team are in a race against time to find the owner of the court shoe before it's far, far too late.

At the same time, Jack is fighting demons of his own. Demons which rise up from the past and threaten to cloud his judgement just when he needs it most.

Detective Jack is hunting a brutal killer. A killer who delights in playing cat-and-mouse games. Who will win this deadly battle of wits?