In the dead of winter, outside a small Minnesota town, state troopers pull two young women and their car from the icy Black Root River. One is found downriver, drowned, while the other is found at the scene—half frozen but alive.

What happened was no accident, and news of the crime awakens the community’s memories of another young woman who lost her life in the same river ten years earlier, and whose killer may still live among them.

Determined to find answers, the surviving young woman soon realizes that she’s connected to the earlier unsolved case by more than just a river, and the deeper she plunges into her own investigation, the closer she comes to dangerous truths, and to the violence that simmers just below the surface of her hometown.