The final part of the crossover event finds our intelligence unit joined by detectives from New York's special victims unit to help solve the pedophile ring case. Ruzek and Det. Amaro along with Halstead and Antonio continue to hunt for the link to foster care and child trafficking. Meanwhile Burgess and Roman try to find the shooter from the hospital after using surveillance footage to identify him. Platt shows her deep respect for police and the dangerous work they do by honoring their fallen brother.

A friend of Nadia's leads the intelligence unit to a huge heroin bust. Unfortunately this bust results in Olinsky arriving home to find the suspects are holding his wife. Voight and the team think they've found a common thread with the suspects but it's not who they think. Meanwhile Burgess and Roman are given an assignment where they get paired with a K-9 officer, Jenn Cassidy who is Roman's former partner and girlfriend.