An exposed secret. A knife. And an argument that changed everything...

Seventeen-year-old Wella Scotland doesn't remember much from the night her best friend disappeared, but a full moon glinting off the knife in his hand is the one thing she can't forget. The argument started when she found out Finn planned to move away; her next memory is running from him. Everything in between is a deep, black hole.

Almost a year later, Finn is nowhere to be found and Wella still doesn't understand how this perfect boy—the one who was her whole world—could ever want to hurt her. She buries her sorrow under mind-numbing pizza deliveries and denial, but when signs that Finn has returned appear around her small town, she can no longer ignore the more complicated story hiding underneath her missing memories.

Enter Tusk, the quirky guy from group therapy, who insists on helping Wella figure out what happened the night Finn left. As the truth unfolds, Wella is forced to rethink everything about Finn—and herself—she once believed. Faced with reality, her decision is clear: salvage her friendship, though it may be too broken to fix, or forever live with the unresolved damage of a night that changed her forever.