The film "Isolation" follows three friends - Charlie, Eddie, and Katie - in the week leading up to a Friday night where one of them will be murdered. Throughout the week, Eddie bullies and torments another boy named Jamie. On Friday night, the three friends prepare to go out but a noise causes them to turn around. It is later revealed that Eddie, who has become emotionally unstable and fascinated by violence, is the murderer. He kills Charlie with the same chain he used to kill another boy, Ally, and Ally's friends earlier in the week.