A young local student has apparently committed suicide. Her body is found in an abandoned car on a lonely country road. She didn't own a car. Didn't even drive. How did she get there? Where did she die? Who moved her, and why?

Meanwhile a man in his sixties is found dead in a gully up on the wild moorland. He is wearing an expensive suit and carrying no identification. Post-mortem findings indicate he died from injuries sustained during the fall. But what was he doing up there? And why are there no signs of a car in the vicinity?

As the inconsistencies multiply and the mysteries proliferate, Annie's father's new partner, Zelda, comes up with a shocking piece of information that alerts Banks and Annie to the return of an old enemy in a new guise. This is someone who will stop at nothing, not even murder, to get what he wants - and suddenly the stakes are raised and the hunt is on.