With a World Trade conference in Chicago, all members ofintelligence are undercover in various protest groups todetermine potential threats. Ruzek, infiltrates the Black Gridgroup and befriends Sierra. When she ends up dead intelligenceis suspicious of an Argentine Secretary, Fabian Sosa. Voightand Olinsky question Sosa about the death and the team enlistsMouse to help with their tech needs in tracking Sosa. MeanwhileHalstead's brother, Dr. Will Halstead shows up in town for anundetermined amount of time and is already stirring up trouble.
