The Simpson family agrees to go to a rib restaurant advertisement, and after arriving, they discover Sideshow Bob attempts to murder the entire family. When Bob is captured by the police, he is put on trial, where Bart throws away his vial of medicine, inadvertently killing him. Bob's brother Cecil invites Bart to pay his last respects to Sideshow Bob. Although Bart doesn't know it, it turns out to be an elaborate plot devised by Bob's entire family to murder Bart instead.