Erin and Anthony try to prevent the deportation of a prominent community activist, who isn't a citizen. Meanwhile, Frank must decide if the NYPD will participate in the U.S. Marshals' high-profile raid of a local gang.
Frank contends with a whistleblower within the NYPD who claims to have evidence of abuse of power in the organization. Also, Danny and Baez investigate the case of a woman who was struck by a car under suspicious circumstances.
After Emily Harrison tells Danny and Baez she's concerned her abusive ex-boyfriend will repeat his behaviour with his new girlfriend, Emily becomes the prime suspect when he's murdered. Also, Eddie gets jealous when Jamie lets a woman crash at his place.