Twenty-five years after her younger sister vanished in the black water of Cold Lake, Special Agent Nora Bishop returns to Harlow, the small Montana town she once fled. A man has just drowned—an accident, they say. Then another. Nora recognizes the victims: they were the teenagers at the lake the night Ella disappeared.

Someone is working down a list. And Nora's name is on it.

Between a father who stayed silent too long, a recluse who knows what the lake swallowed, and a truth an entire town chose to forget, Nora must reopen the oldest wound of all—her own. Because some drownings are no accident, and the water sometimes gives back what everyone believed was lost for good.