Jorden Leon, an embalmer, takes a part-time night security job at a private museum offering an unusually high pay. Upon arrival, he learns his predecessor met a mysterious and grim fate, hinting at dangerous conditions. The museum manager emphasizes a strict contract: complete a full month or face severe penalties. Jorden is given a list of eerie rules meant to keep him safe, including avoiding daytime visits, covering the Tomb Guardian’s eyes if they move, ignoring a mysterious woman's crying, and dealing cautiously with a headless bronze figurine. As his first night progresses, the unsettling warnings cast doubt on whether he can survive the month ahead.