Last summer, Luce, Edie, Jane and Nan took a boat out for one final swim in the river. It was a perfect summer night. But the only one who returned that night was Nan. The others disappeared, and Nan's story has always been the same: The girls went ahead, and vanished into thin air. Now, one year later, all of Saltcedar has gathered at the river for a memorial. Nan even recreated the outfit she wore that fateful day last summer. And when Luce climbs out of the water, no one is more surprised than Nan. Because Nan killed her. Right before she killed Edie and Jane.