A high-profile activist suspects her sister has been kidnapped by a hate group; Garland & Benson push for change with NYPD brass; Kat gets some good news.
As the investigation into a sex-for-housing scheme expands, Benson's loyalty to Garland is tested. Rollins and Carisi try to keep their witnesses on board when a powerful congressman is identified as a suspect.
A fringe, possibly trafficked 17-year-old leads her rap crew to a rival's hideout under the guise of a hookup text. Homicide gets involved, and her mere involvement vs. masterminding come to question.