Megan Reed, a former police officer grappling with trauma and addiction, lands a job working the graveyard shift at a hospital morgue. Seeking to rebuild her life, Megan is determined to prove her reliability and competence. However, her routine duties take a dark turn when the disfigured corpse of a young woman, Hannah Grace, is delivered to the morgue under mysterious circumstances. As Megan works through her shift, she begins to experience eerie and inexplicable occurrences centered around Hannah's body. Strange noises, flickering lights, and unsettling visions start to plague her, weaving an atmosphere of escalating dread.

As the night progresses, it becomes apparent that Hannah’s death may not have been merely a tragic incident. Megan's strong sense of duty compels her to stay vigilant, but she soon discovers that malevolent forces are at play, exploiting Hannah's lifeless form for their sinister agendas. The boundaries between reality and nightmare blur, and Megan is forced to confront not only the horror in front of her but also her inner demons. Mysterious deaths and chilling revelations unfold within the morgue's claustrophobic corridors, leading Megan into a battle against unspeakable evil that pushes her sanity and resilience to their limits.