Chicago P.D.

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.

When Atwater goes undercover in a drug syndicate, he learns there may be more to its kingpin than meets the eye; Halstead tries to join Atwater undercover, but finds himself at a disadvantage; Voight petitions the brass to show Ruzek leniency.

After a botched carjacking turns out to be something much bigger, Voight's unit goes toe-to-toe with a smart drug kingpin who only works with women; new recruit Vanessa Rojas struggles with the transition from under cover to intelligence.

The shocking murder of young boys affects Halstead; Crawford encourages Intelligence to use a new facial recognition software to help identify a suspect, but the plan backfires.