The family travels by train to Dede's wedding. Phil and Cam help a mystery writer with his book, Jay's comment puts the wedding in jeopardy, Claire helps Mitch write the toast, and Luke and Alex meet possible romantic interests.
Dede is getting remarried, so Manny convinces the family to take the train up to the wedding. Jay is ecstatic that Dede has finally moved on but he might regret his over-enthusiasm later. Gloria gets stuck in coach. Claire and Mitchell work on their wedding toast. Phil and Cam discover their favorite author is on the same train as them. Luke and Manny go a bit girl crazy. Finally, Alex gets caught up in the romance of the train.