Patterson fills in for Boden, who’s trying to clear his name. Severide learns where Serena may be hiding. Herrmann and Otis give Freddie a job that keeps him close by….

Voight takes the stand in a high-stakes murder trial against notorious drug kingpin Arturo Morales. When it becomes clear that Morales and his henchmen have compromised a juror, Voight and…

After receiving a distressing 911 call, Burgess enlists the team’s help to track down a girl caught up in a sex-trafficking ring.