**From #1 *New York Times* bestselling author Lisa Gardner comes a harrowing new thriller:** Frankie Elkin is an expert at finding the missing persons that the rest of the world has forgotten, but even she couldn’t have anticipated this latest request—to locate the long-lost sister of a female serial killer facing execution in three weeks’ time. *She has called herself death, but people called her the devil.* The case was sensational. Kaylee Pierson had confessed from the very beginning, waived all appeals. Despite the media’s chronicling of her tragic circumstances—the childhood spent with a violent father—no one could find sympathy for “the Beautiful Butcher” who had led eighteen men home from bars before viciously slitting their throats. Now, with only twenty-one days left to live, Pierson has finally received a lead on the whereabouts of the sister who was kidnapped over a decade ago, and she needs Frankie’s help to find her. The Beautiful Butcher’s offer: *When was the last time your search ended with finding the living?* Unable to resist the chance for a rescue, Frankie takes on Pierson’s request. Twelve years ago, five-year-old Leilani went missing in Hawaii. The main suspect? Pierson’s tech mogul ex-boyfriend, Sanders MacManus. Now, on a remote island in the middle of the Pacific—the site of MacManus’s latest vanity project—fresh evidence has appeared. In order to learn the truth and possibly save a young woman’s life, Frankie must go undercover at the isolated base camp. Her challenge: A dozen strangers. Countless dangerous secrets. Zero means of calling for help. And then the storm rolls in…