Obsession tells the tale of a crazed psychopath who has an unhealthy obsession with a girl (Gemma) he has known for years through out his school life. He has always had a crush on her and gets very jealous when any one comes close to her, even her own brother! His stalking turns into a night of blood shed when he kills Gemma, the girl of his dreams, the only one thing he loved, from then on nothing else and no one else matters!