After Bart gets completely naked at the PTA meeting at Springfield Elementary, Principal Skinner decides to expel him and Homer tries to sue Skinner for not providing proper "babysitting" of his kid. Marge tries to find a new school for him but no one will accept him even a military school because of Skinner's influence. Bart gets tired especially with Krusty not on til 3pm and tries to go to the Kwik-E-Mart but Apu refuses to serve him and then he meets Skinner's mother, Agnes Skinner, and she gets an idea how they can take Bart back to school. Bart starts to help Agnes and deprive Skinner his duties which he did not like. It does not get better when Bart spends the night with Skinner, after a few days Skinner lets him go back to school again, and everything goes back to the way it was before.