After Bart gets bullied at the school dance, Marge convinces the town to pass anti-bullying legislation. Homer then gets arrested and sent to rehab for bullying Ned Flanders, only to subsequently leave rehab as a hero.
Bart isn't excited about going to his first school dance, but after he accidentally destroys the orange drink dispenser Mrs. Muntz's fiancée brought over, a 5th grade girl is impressed and asks him to dance.
Bart then wins the "Best Dancer" trophy and the girl asks him to
meet her outside, but the bullies are waiting for him and they break his
trophy and humiliate him, leading the girl to tell him "a life lesson" and leaves him.
When Bart tells Marge about the incident, she goes to a City Council meeting and says it's time to make
bullies feel scared instead of their victims, and a bill giving the
police wide powers to crack down on bullying is passed unanimously.
Prior to the bill being passed, Hans Moleman initially voted "No" until Mayor Quimby angrily threatens and hits him causing him to change his vote to "Yes."
Chief Wiggum starts out by legitimately arresting bullies like Jimbo,
Kearney, and Dolph after they try to steal Bart and Milhouse's sleds.
Chief Wiggum soon he begins throwing everyone in jail who is wrongly
accused of bullying (including fellow officer Lou for not letting him steal his lunch). Homer, who has abused the new law, gets a taste of
his own medicine when Rod & Todd Flanders (who are fed up with how
Homer treats Ned) have him arrested and he's sentenced to 30 days of
treatment. While in the center, Homer has an epiphany that he is cruel
to Ned because his neighbor is better at Homer in everything he does,
and Homer is then held up as a paragon of reform and celebrated.
However, Ned doesn't accept this ridiculous logic and bluntly tells
Homer that Ned does not forgive him for his past actions. A distraught
Homer begs for forgiveness which Ned refuses several times. When Homer
penitently kneels on Ned's lawn for a long stretch, Ned tells him he is
forgiven. The Simpsons and Flanders then join together and have brunch.