The document describes a psychological/paranormal genre concept blog about possession. The story involves a 17-year-old girl named Katy who moves into a new house where another 17-year-old girl had died. A supernatural force is trying to possess Katy's body and take over her soul and life. The target audience is teenagers aged 15-17 who enjoy thrillers. The concept draws inspiration from films like The Exorcist, Unfriended, The Awakening, Insidious 3, and Scream. The film is titled "Possession" and features Katy as the vulnerable protagonist and the ghost of the other girl as the antagonist seeking to possess her. Key locations and scenes are outlined.