Marcel and Charles treat Lieu's gym buddy; Maggie and Halstead help a robbery-homicide suspect; Asher and Archer use Med's new opiate abuse AI programme.
Diane and Maia settle into Reddick, Boseman and Kolstad. Maia continues to deal with her family's Ponzi scheme, but she unexpectedly picks up a new case.
Mike Kresteva pushes his case through to a grand jury, but the firm comes up with a plan to counteract his efforts. Colin ends up in an uncomfortable situation in court.
When a sergeant's son is accused of rape, Benson is put in a difficult position and forced to choose between loyalty and duty.
Elizabeth brings Alison with her on a state department trip to India. When an earthquake causes an explosion at an American-owned factory, the chaos separates Elizabeth from her daughter.