While heading to a family reunion, the Herring family experiences a devastating car crash, only to awaken trapped in a chilling, pitch-black basement. Inside this eerie confinement lurks a terrifying creature, confined but hungry for human flesh. Alongside this monstrous being is a shadowy figure acting as its keeper, controlling it like a dangerous pet. To survive, the family must unite, confront both the creature and its enigmatic master, and discover a way to break free from their sinister captivity.