A young Homer and Marge purchase their first home. They move in with their darling Lisa. Unfortunately their house is just down the road from the new Nuclear Power Plant. After many years, Homer wakes up to find he lost his hair, the shock causes him to slip and fall in the bathroom. An ambulance is called and tests show Homer has radiation poisoning. It doesn't look good for him, and the family is heartbroken. Homer slowly regains his health and is well enough to go home, but he knows his time is limited with his daughter, so he tries to make the best of it. One day, Homer gets really sick and passes away. Lisa spends her birthday alone for the first time, without her father.