The sequel to the 1991 hit, follows an investigator with the Chicago F.D., who has to track down an arms dealer who use deadly fires as a distraction.The sequel to the 1991 hit, follows an investigator with the Chicago F.D., who has to track down an arms dealer who use deadly fires as a distraction.The sequel to the 1991 hit, follows an investigator with the Chicago F.D., who has to track down an arms dealer who use deadly fires as a distraction.