Something is lurking beneath the water's surface . . . Casey Fletcher has escaped to her family's lake house to mourn her late husband in peace and quiet. Looking out onto the still water, she catches a glimpse of the glamorous couple across the lake. They look so perfect - just like Casey and her husband used to be. But is anyone what they seem? Casey has a detective sat at her kitchen table. She has a man bound and gagged upstairs. And she is about to uncover dark truths so life-changing that nothing will ever be the same again . . . THE INSTANT NEW YORK TIMES BESTSELLER - this unputdownable thriller will have you up all night, racing through the pages. Perfect for fans of Freida McFadden, Alice Feeney and John Marrs.