Mitch's defense of a new client, Nate Murphy, is complicated when the young man's brother is named as a co-defendant. Running out of time, Mitch must convince Nate to go against his own brother and become a witness for the prosecution. Meanwhile, Tammy turns up the heat on a potential ally, Martin Moxon, to help explain his cryptic clue in the slow evolving Sarah Holt case. 

Mitch and Ray probe the death of a sergeant's son and the case becomes a national security matter; Tammy lands a new job to break new ground in the Sarah Holt case.