When a father and son bank-robbing duo escape from a prison transport van on their way to trial and pick up where they left off, the team must hunt them down before they steal enough money to escape the country.
When Kelton is found murdered, Voight's grudge against the mayor-elect puts him under suspicion; Upton and Halstead are eager to prove their sergeant's innocence, but the more evidence they gather, the closer they come to doing the opposite.