A female serial killer with a deadly agenda. The detective who must stop her. Luxury holiday lodges in the stunning Peak District. The game begins . . . Callum is lured to an isolated boathouse by an attractive older woman. When she gets him alone, she knocks him out with a single blow. As he wakes up, her voice comes out of the darkness, “You’re a sprat to catch a mackerel.” Surrounded by hills and lakes, Still Waters is home to a close-knit community of wealthy retirees. It’s an unlikely setting for violence. The police don’t take Callum’s disappearance seriously: he’s 24-years-old, after all. But Callum’s mother, a Still Waters resident, knows that something is very wrong. Then a body is discovered floating in the lake. Head bashed in. But it’s not Callum. And someone tweets:Come out to play one last time, Alice. Still Waters run deep. #MadHatter. That’s when DCI Alice Rossi is called in. She’s back. IT’S A CAT-AND-MOUSE GAME BETWEEN AN OBSESSED KILLER AND A DETERMINED DETECTIVE IN THIS GRIPPING MYSTERY FULL OF STUNNING TWISTS.

Day 1. A young woman’s body is found in a shallow grave in the woods, buried in a white shroud. She’s been dead for a week. Her teeth are smashed in, her lips stitched together. Her hands are missing. She’s the fourth young woman found like this. With no witnesses, no clues and no leads to follow, the investigation is going nowhere. That’s when Detective Alice Rossi is called in. Alice knows this case is a poisoned chalice. Not least because she has a new team to contend with—who don’t like being bossed around by a woman. Day 2. Sixteen-year-old Maggie Hewson is reported missing. She never came home from school, and her father is beside himself. Will she be the fifth girl to die?