When Intelligence follows up on a tip Antonio and Halstead received from a reliable informant about an upcoming drug trade, the team is shocked to discover the mutilated body of a man. Upon further investigation, the body is identified as a government official and when Olinksy, Ruzek, Lindsay and Halstead question the man's acquaintances they discover he had access to very important devices. Meanwhile, Burgess helps plan a surprise for Platt.