Frank and Danny are determined to put away an international felon who repeatedly manages to walk away from murder charges, but they struggle to come up with the necessary evidence to earn a conviction. Meanwhile, Erin debates going into private practice when she looks into college costs for Nicky, and Danny butts heads with his new boss.

Frank faces public backlash after an officer's body camera malfunctions during an altercation with a civilian. Meanwhile, Danny and Baez struggle to protect an informant after the U.S. Marshall's Service decides not to put him in Witness Protection, and Erin investigates an old friend's daughter's claim of rape at a prestigious university.