Upstairs (2009)

Grace Stearn finds herself in financial turmoil following her father's passing, prompting her to rent a room to an unfamiliar tenant, Ward Weaver. Unbeknownst to her, Weaver harbors a sinister secret, making him a dangerous psychopath. As Grace navigates her precarious situation, she unwittingly invites a malevolent force into her home, leading to a chilling confrontation that threatens her safety and sanity. Tension escalates as Grace's struggle for survival unfolds, revealing the dark undercurrents of trust and deception in this gripping psychological thriller.