Jess invites Nick and Angie to spend a couples’ weekend with her and Sam. Once there, however, she quickly discovers that two’s company and four’s a crowd. Meanwhile, Winston tries to teach Schmidt about race relations.
Team Scorpion heads to Mexico when a tech billionaire hires them to rescue his kidnapped daughter. Also, feelings are hurt after Walter gives an interview and fails to acknowledge the other members of the team.
Christian becomes furious when Sean agrees with Grace, who is now the practice's in-house psychologist, regarding a woman's desire for extensive surgery in order to look beautiful for her high school reunion.
An investigation into weapons trafficking becomes personal for Tommy when an old friend becomes connected to the case. Also, Lockhart demands to see results from Kyle’s investigation into Frank’s actions, leading Frank to reveal surprising information to his trainee.
Sharon's son, Ricky, comes home for a surprise visit while Major Crimes investigates what looks like the "follow home" murder of a retired LAPD fraud detective, who may have been murdered for an arrest she made decades ago.