Krusty is forced to add a female character named Princess Penelope to his show in order to attract more female viewers. She immediately overshadows Krusty as the ratings improve. Bart and Milhouse want to get the show back to the way it was, but the situation gets more complicated when Krusty and Penelope fall in love and decide to get married. Meanwhile, Homer, Lenny, and Carl consider working at a competing nuclear plant when Mr. Burns cuts off their daily doughnut service.