Seventeen-year-old Daniel harbours a dangerous obsession with one of his classmates, Mona, and he cyber-stalks her. Detective Stokes intervenes to protect the young woman, confining Daniel to his house without his mobile phone or internet access. Thanks to his friends, Daniel acquires a tablet and logs onto the internet via a neighbour's WiFi. He continues the pursuit of Mona, but is stunned when she commits suicide on camera. Soon after, the housebound 17-year-old experiences strange phenomena.