On Wednesday's episode of Chicago P.D., the Intelligence Unit looks into the recent death of a college student, the latest casualty in a rash of fatal opioid overdoses that has plagued the city. The investigation leads them to a campus drug ring that's supplying students with the deadly narcotic fentanyl.

In an exclusive clip from "A War Zone," Atwater (LaRoyce Hawkins) and Ruzek (Patrick John Flueger) head straight to the source. Ruzek goes undercover to try and score from one of the ring's (alleged) leaders, with Lindsay (Sophia Bush) and Halstead (Jesse Lee Soffer) keeping an eye on them from a nearby surveillance point.

Will the team be able to put a stop to the deaths, or is the problem simply beyond their reach? Watch the sneak peek to see what happens when Ruzek tries to do a deal with the target.

Chicago P.D. airs Wednesdays at 10/9c on NBC.