Two aliens come out of their spacecraft and ask to see the supreme earthling potentate. Calvin says they're speaking to him. One of the aliens says he chose the landing site. Kudos to navigator Nebular.

The aliens are taking over the world. Calvin asks why. The aliens reply earth is prime real estate. Calvin says he never thought of that. One alien says there is charm, atmosphere, and a quiet galaxy. Hobbes says the atmosphere needs cleaning. The other alien says it's a good fixer upper.

Calvin says he can't let them come in and take over the planet. The aliens tell him to prepare for war. Calvin offers to trade the earth for fifty alien tree leaves. One alien whispers the primitive fools must use leaves for currency. It's a deal. Calvin says he needs them by 8:00 tonight, properly identified and labeled. The aliens race off, saying their leader will be most pleased.

Calvin looks out the window to see snow. He thinks it will be perfect sledding weather. The doorbell rings. It's the aliens Calvin sold the planet to for fifty alien tree leaves. They asks what's wrong with the planet he sold.

The aliens complain the cold white glop covers them and freezes their innards. Calvin says it's snow. They get it every winter. The aliens complain Calvin didn't tell them about that. He replies that they didn't ask. They say they were overcharged. Calvin tells them "let the buyer beware". The aliens walk off complaining that he's a dishonorable potentate. They demand he bring the planet up to code.

Mom asks who's at the door. Calvin tells her it's the Girl Scouts. He whisks the aliens outside. He tells them he'll see what he can do about fixing the climate. Mom asks where the Girl Scouts went. Calvin says they had to earn a merit badge.

Hobbes puts the Christmas stockings on the aliens. They thank the earth leader and leave. Calvin complains Santa can't fill them with loot. Hobbes is sure that Santa knows they did a good thing, and things will work out. Calvin realizes he did do something good. He's thinking jackpot now. Hobbes says Calvin's selflessness is the hope of the season.