Lucy became a literary horror celebrity when her trilogy of horror novels about Martian clowns became cult movies. But by the time her agent requested she'd pen a fourth one, she'd lost all inspiration. Her longtime friend Kat suggests that she take a personal vacation, find a desolate cabin somewhere and to focus on her writing, whether it's about a clown sequel or just to escape and breathe. A tourist site online draws her to a small reclusive forest island and she books a trip there, having no idea what terrifying and creeping monstrosities await for her arrival, and to once again feed. By day, they sleep. But by night, they slither.