Homer discovers that he has not done anything in life that will be considered worthwhile after he dies. In an attempt to find a way to be remembered, Lisa introduces Homer to Thomas Edison, prompting him to become an inventor himself. However, his initial inventions are considered unpractical and not well received. Depressed, Homer comes up with an untipable chair which saves his career, only to discover that Edison also invented the same design. Consequently, he sets out to destroy the Edison's version at New Jersey. There, he has a change of heart and decides to destroy Eli Whitney's inventions instead, only to leave his electric hammer behind, making Edison's heirs richer, making Homer more depressed.