Homer and Bart fix things around the house using fireworks. They destroy Lisa's room on her birthday, so help make it up to her, the family goes to a book fair, where among other things Krusty is signing his new book. A little girl named Sophie is in line and she tells Krusty that she is his daughter. Krusty flashes back to his role in the Gulf War. Sophie's mother now hates Krusty. Krusty tries spending time with Sophie at the beach, but they don't bond very well. He sees Homer interacting with his kids and gets some parenting advice from his. Krusty gambles away Sophie's violin in a poker game with Fat Tony. She gets very upset with Krusty, so he (with Homer's help) try to steal back the violin. There is a big Mafia summit at Fat Tony's place and Krusty manages to escape with the violin and a bunch of cash. He wins back Sophie's love, but the mob goes after Homer for his role in the caper and shoots at him. Somehow Homer escapes.