The Louisiana bayou is haunted by strange disappearances in a YA paranormal mystery that is "American myth at its very best" (New York Times–bestselling author Kiersten White).

Growing up in the backwaters of Louisiana, Sterling and her brother Phin have survived a great deal together. So when Phin suddenly disappears, she’s devastated. But even more upsetting than his disappearance is the reaction Sterling gets from everyone around her: no one else even remembers Phin existed.

It seems a nearby swamp has a terrifying power over the inhabitants of Sterling’s hometown. Now Sterling, with the help of brooding loner Heath, who's had his own creepy experience with the swamp, must fight back and reclaim what—and who—the swamp has taken.