Notorious juvenile hacker Nicholas Anthony has left his criminal past behind and is grateful for his second chance at life as a police detective. When a string of unsolved murders all lead back to a social networking Web site, he is the obvious choice to lead the investigation. As Nick and the detective squad race to identify the next one to be killed, former lawbreaker Nick himself falls under suspicion. He can no longer be trusted and is suspended from his job. Without his expertise, the police are forced to use one of their own, Detective Donna DiRenzo, as a decoy, hoping that the killer will select her as his next victim. That plan proves all too successful, and Nick, working alone, becomes the only one who may reach her in time to save her life.