Following their daughter's mysterious disappearance, Devon's parents never stopped searching for the truth. After the asylum she disappeared from was condemned, their questions looked like they would remain forever unanswered. Years later, a cryptic website recruits five courageous individuals to explore the abandoned asylum and discover what happened to the girl. Unaware that they are embarking on a perilous, one-way journey, these individuals delve into the sinister depths with only their equipment, leading to a terrifying and deadly experience.