Elliot, a widowed writer with a history of anxiety, moves to a secluded cabin in the woods to find peace and inspiration for his next novel. Plagued by insomnia and paranoia, his thoughts frequently drift toward his late wife's mysterious death. Amongst this haunting backdrop, Elliot discovers an old, concealed diary hidden beneath a floorboard. The diary, penned by a woman who previously lived in the cabin, details unexplainable occurrences and visions that mirror Elliot’s own unsettling experiences. As he delves deeper into her writings, eerie noises around the cabin grow louder, and Elliot begins to doubt the line between reality and imagination.

Determined to unearth the truth, Elliot seeks help from Sarah, a local historian who is intrigued by his findings and curious about the area's dark history. They uncover disturbing secrets about past residents who vanished without a trace. Intensifying both his fascination and fear, Elliot becomes consumed with the idea that a malevolent presence still haunts the cabin. Tensions rise when Aaron, a mysterious handyman with unknown motives, begins lurking around the property. As strange phenomena escalate, Elliot must confront his deepest fears and the unsettling truth about what drives his paranoia. Sarah's quest for historical clarity intertwines with Elliot’s growing desperation to untangle reality from illusion as they edge closer to a chilling revelation buried in the shadows of the past.