The story of Watch Dogs follows Aiden Pearce (Noam Jenkins), a skilled hacker and former thug. Eleven months after his actions led to the death of his niece, Lena, Aiden seeks to bring his own form of justice to the culprits by manipulating Chicago's CtOS, or Central Operating System, a supercomputer that controls every piece of technology in the city and contains information on all of the city's residents and activities which can be used for various purposes.