Act as a seasoned screenwriter with a background in horror and psychological thrillers. Craft a gripping story about [CHARACTER_NAME], a [PROFESSION] who wakes up trapped inside the infamous [ASYLUM_NAME], a long-abandoned mental institution with a dark history of [HISTORIC_EVENT]. The character must navigate through the asylum's eerie halls, uncovering disturbing secrets while being pursued by [SUPERNATURAL_ENTITY]. The story should build tension through atmospheric descriptions, unreliable perceptions, and a race against time as the character's sanity begins to unravel. Include at least three key twists, and ensure the climax delivers a satisfying yet ambiguous resolution that leaves room for interpretation.