Claire brings home a stray dog and gets the kids to help her hide it from Phil while she tries to find its owner. Unfortunately, her evasive behavior only makes Phil try even harder to shower her with more attention. Elsewhere, Gloria invites a new couple over even after Jay has made it clear he doesn't want to make any new friends, but when the husband turns out to be a real guy's guy, Jay might be eating crow. And Cameron rents out their upstairs apartment to a Christian rock band.

Dede is getting remarried, and Manny convinces the family to take the train up to the wedding. Jay could not be more ecstatic that Dede has moved on for good but his overenthusiasm might come back and bite him later. Claire and Mitchell work on their toast while Phil and Cam geek out over their favorite author, who is also on the train. Luke and Manny go a little girl crazy; Gloria gets stuck in coach; and Alex gets caught up in the romance of the train herself.