Billy Madison is forced to go back to high school years later to earn his rich father's respect. After being laughed at by his fellow students, Billy is reminded that he used to do the same thing to others. He goes back and seeks forgiveness from an old classmate that he used to bully.

Billy's father hosts a dinner with a group of business executives, and Billy shows poor etiquette. He slurps his soup and disrupts the conversation several times with his outbursts. Billy illustrates how not to act at the dinner table.