A group of friends exploring a forgotten underground bunker stumble upon a strange device that emits a pulsating light. When they touch it, they are transported to a surreal alternate reality where their deepest fears and anxieties manifest as terrifying creatures. The device, they learn, is a beacon of negativity, drawing in the darkest corners of their minds and twisting them into nightmarish monsters. The friends must face their inner demons and overcome their fears to break free from the bunker's grip and return to their reality before the device consumes them completely.