Tony's acting odd, and Tim McGee can't figure out exactly why. It turns out Tony's been attending a men's support group twice a week, which only deepens the mystery. Meanwhile, the team investigates the hit-and-run death of Petty Officer Jody Ray. During that investigation they stumble upon another murder not within their jurisdiction. The alibi for the owner of the hit and run vehicle is rock solid: he didn't do it, because he was in another town murdering a man. The NCIS team eventually figures out that the truck owner - Sgt. Justin Dunne - had made a pact with two other members of his A.A. group - Olivia Chandler and Wendell Kaiser - who had decided to swap murders. Dunne killed a bookie who was owed money by Kaiser. Kaiser in return was planning to murder Chandler's husband - so that she and Dunne (who were lovers) could stay together and have access to her elderly husband's money. NCIS figured out that the week link between the three of the conspirators was Wendell Kaiser. After convincing him to turn State's evidence, Chandler and Dunne were arrested.
McGee: Tony what's going on? Do you have a drinking problem?
Tony: No. No, I just....I joined this men's support group. Meets in the church hall two nights a week.
McGee: You serious?
Tony: Uh huh. I know - it doesn't sound like me. But, with the past year I just wanted to shake things up a little bit. Meet some new people. This guy at the gym told me about the group and I thought it sounded like a good idea. And it is. It's fun. The Rev drove me to Quantico the other morning. Interesting guy. He's helping me be less judgemental.
Tony: Sgt. Dunne, Olivia Chandler and Wendell Kaiser all have one thing in common. They all go to AA meetings.
McGee: Probably where they met.
Tony: The sergeant and the trophy wife are lovers. The desk clerk at the Chevy Chase Lodge said that they were regulars. It's just like that movie "Body Heat". William Hurt and Kathleen Turner. God. She was really something, boss. A head turner. Anyway, they were young lovers and they wanted the rich husband's money and him out of the way.
McGee: On the other hand, you've got Wendell Kaiser who's deep in debt to his bookie and needs him off his back.
Tony: So they help each other and switch murders.
McGee: While Kaiser was in New York, Dunne killed the bookie with Olivia's help. She drove him. Her car was in the vicinity. Who would ever suspect them? I mean there's no connection, no motive.
Tony: Tomorrow, Sgt. Dunne is going to deploy. Olivia Chandler's off to Jamaica. And I'm betting that while they're away, her husband's going to have a terrible accident at the hands of Mr. Kaiser here - a man with whom he has no connection.