Pine Island, where mainlanders aren't allowed, is alive with ghost stories and dares that fuel rumors. Everything changes when a flyer featuring a teen from the island lands on Sheriff Theresa 'Tre" Finkle's desk. She never expected to return to the sickle-shaped island she fled in the middle of the night eighteen years ago. Instantly Shunned as her boots hit the dock, Tre has no choice but to depend on her by-the-book deputy, soon treated like royalty, and her eccentric, lantern-carrying alcoholic brother, Jacob 'Finkle' Finkle, for help. A mutilated body is discovered deep in the woods, Tre's deputy vanishes, the dead reappear, and Tre begins to stalk herself as the strange traditions reach out their arms to embrace her once again. But, just as the Finkle siblings realize what's going on - it's too late because what's in the dark emerges to take a breath.