For fans of Midnight Mass comes a haunting new horromance. Something dreadful is festering in the old Thomas Bog. For years, it's done what it has been taught to do—it swallows. But it's done following orders.

It's been three years since Mila Thomas's brother Jed went missing and his case went cold. Since then, Mila has fled town, running from the voices of the dead that reach her from the depths of the old family bog, afraid she would hear her brother's among them.

But when her younger sister, Agatha, calls her back home to celebrate her graduation, Mila can’t help but return to her old haunts. When she arrives, Mila comes face to face with the town reverend, who informs her that Agatha is now also missing. Finding her mother and the local police utterly useless, Mila opens herself up to the voices of the bog in the hopes that they can tell her where her sister is. But something else lurks beneath the bog's waters, something that would sooner hunt her than help her. As more bodies turn up on the sandy shores, Mila must overcome her complicated history with the reverend's estranged son—the boy she never quite got over—to unearth the fate of the town's missing members and the family secrets that may be behind everything.