Chandler's romance-novelist mother comes to New York to visit him, and Joey catches her and Ross kissing.

Although the Thanksgiving meal is great, Chandler is still moody over his parent's divorce during the holiday when he was a boy and Ross is depressed about his second divorce. The group reminisces about their worst Thanksgivings in order to cheer them up, and Monica's worst memory is revealed.

So close to the wedding, Chandler suddenly realizes the overwhelming meaning of getting married and takes off without warning anyone. Meanwhile, Joey acts opposite a famous actor in a movie, but can't bring himself to tell him that he spits when he says his lines. Phoebe and Ross try to find Chandler before the wedding starts, while Rachel tries to hinder Monica, so that she doesn't find out the shocking news. On the day of the wedding Joey encounters a scheduling problem, while Phoebe and Rachel come across a surprising discovery.

The excitement of Monica and Chandler's wedding is diminished by the news that someone may be pregnant. Chandler's hopes of not embarrassing Monica on the dance floor are ruined by his slippery new shoes, and Ross' attempts to flirt with an attractive wedding guest.