high-end Merlaut Hotel, hacker Aiden Pearce and his mentor and partner, Damien Brenks, trigger a silent alarm set by another hacker. Damien tries to find the hacker, giving himself and Aiden away. Fearing for his family, Aiden drives them to safety in the guise of a surprise trip to the country. On the way, hitman Maurice Vega attacks them, resulting in a car crash that kills Aiden's six-year-old niece Lena. A year later, Aiden tracks down Vega at a baseball stadium - but is unsuccessful in learning the identity of his contractor. Leaving Vega in the hands of his partner, hired fixer Jordi Chin, Aiden visits his sister Nicole and nephew Jackson for the latter's birthday but learns someone is harassing them. With the help of Clara Lille, a member of the hacking syndicate DedSec that is trying to expose Blume's corruption, Aiden tracks down the harasser, revealed to be Damien, who wanted to get Aiden's attention so that he will help him find the other hacker from the Merlaut job. Aiden refuses but, after dealing with a witness from the stadium, he learns that Damien kidnapped Nicole to force him to comply. After setting up a new hideout in the Bunker – an undetectable former Blume base with access to ctOS – Aiden tracks down the hacker with Clara's help: gang leader and Army veteran Delford 'Iraq' Wade. To reach Iraq's servers, Aiden infiltrates a human auction he is attending to copy his access key, and blackmails his cousin Tyrone "Bedbug" Hayes into acting as his inside man. Bedbug manages to obtain a data sample revealing that Iraq has information on almost every citizen of Chicago, protecting his gang from the authorities via blackmail. When Aiden and Clara come across encrypted data beyond their abilities, they track down legendary hacker and former Blume whistleblower Raymond "T-Bone" Kenney, who caused the Northeast blackout of 2003 while trying to expose the dangers of ctOS, which he had helped to create. Aiden infiltrates the Blume headquarters to erase Kenney's identity from ctOS and allow him to return to Chicago. However, Damien gives up Kenney's location in exchange for full access to ctOS, forcing Aiden to rescue him before he is killed by Blume's private security forces. Afterward, he assaults Iraq's compound to finish downloading its server data and kills Iraq when he confronts him. Aiden, Kenney, and Clara are unable to decrypt