A small town hides a big secret… Who killed Emily Vaughn? Prom Night. Longbill Beach, 1982. Emily Vaughn dresses carefully for what's supposed to be the highlight of any high school career. But Emily has a secret. And by the end of the night, because of that secret, she will be dead. Nearly forty years later, Andrea Oliver, newly qualified as a US Marshal, receives her first assignment: to go to Longbill Beach to protect a judge receiving death threats. But Andrea's real focus isn't the judge – it's Emily Vaughn. Ever since she first heard Emily's name a year ago, she's been haunted by her brutal death. Nobody was ever convicted – her friends closed ranks, her family shut themselves off in their grief, the town moved on – so the killer is still out there. But now Andrea has a chance to find out what really happened…. Who killed Emily Vaughn? The stunning new standalone thriller from international No. 1 bestseller Karin Slaughter. A girl with a secret ... Longbill Beach, 1982. Emily Vaughn gets ready for prom night, the highlight of any high school experience. But Emily has a secret. And by the end of the evening, she will be dead. A murder that remains a mystery ... Forty years later, Emily's murder remains unsolved. Her friends closed ranks, her family retreated inwards, the community moved on. But all that's about to change. One final chance to uncover a killer ... Andrea Oliver arrives in town with a simple assignment: to protect a judge receiving death threats. But her assignment is a cover. Because, in reality, Andrea is here to find justice for Emily - and to uncover the truth before the killer decides to silence her too.