Calvin tells Hobbes that since September, it's gotten colder and colder. He's also noticed there is less daylight. He says that can only mean one thing. The sun is going out! In a few more months, the earth will be a dark and lifeless ball of ice. Hobbes doesn't feel so bad about not setting up an IRA last year.

Calvin tells Hobbes that Dad said the sun wasn't going out. He said it's colder because the earth's orbit is taking them further from the sun. He says winter will be here soon. Calvin laments that some people's grip on their lives is so precarious that they embrace any preposterous delusion rather than face an occasional bleak truth.

Hobbes asks if Calvin is going to live his last few months any differently since the sun is going out. Calvin tells him he's always believed in living each day as if it were his last, so he has no regrets. Calvin thinks that is inspiring. Hobbes says it would be if he were someone else. As Calvin sits reading comic books and eating cookies, he asks Hobbes to pass the issue of Captain Napalm.

Calvin says his teacher told him the same as Dad did, the sun isn't going out. It's just getting colder because winter's coming. Dad was right all along. Calvin tells Hobbes to imagine ol' Dad knowing something like that.