Fat Pig tells the story of Tom, a stereotypical professional businessman in a large city, who falls for a very plus-size librarian named Helen. They meet in a crowded restaurant at lunchtime and begin speaking to each other. Tom is taken with her brash acceptance of the way people see her and her in-your-face honesty. He asks her for her phone number and they start to date. A couple of weeks later, Carter, Tom’s best friend, starts to notice the signs of Tom having a new girlfriend. He obnoxiously pesters him for information about the new girl and in order to get it mentions it in front of a woman from accounting, Jeannie, who has been seeing Tom on-and-off for a while. She gets very upset which gets Tom to admit that he is “sort of” seeing this new woman in his life. Carter asks Tom what he is doing that night, and Tom says he is busy. Carter knows then that he is meeting Helen at a restaurant Tom frequents, Tom denies it and says it is a business dinner with people from the Chicago branch of their firm. Carter, not believing him, stops by the restaurant and sees them together. He approaches them and introduces himself to Helen, and she excuses herself to go to the restroom. While she is gone Carter thoroughly insults her weight and calling her a lot of horrible things (‘fat pig’ among others), not knowing that this is Tom’s new girlfriend. He assumes then that Tom was telling the truth about the people coming in from Chicago and that Helen is one of his business contacts, since he thought that Tom would never date anyone that “fat”.