Calvin asks Hobbes what he's going to dress up as for Halloween. Hobbes isn't sure yet. Calvin tells him the idea is to go as the scariest thing you can think of. Hobbes makes a fearsome face and says he might just go as himself. Calvin plans to go as a barrel of toxic waste.

Calvin gets ready to carve the jack-o'-lantern. Calvin draws the eyes and explains to Hobbes that it will look like a face when they're done. First, though, they need to open up the top and scoop out the glop inside. Calvin grabs a knife and says "OK, Jack, time for your lobotomy". He asks Hobbes for a big spoon. Hobbes covers his mouth and is sickened by Calvin not even using an anesthetic.

Calvin tells Hobbes he thinks Dad likes Halloween as much as they do. Hobbes asks if Dad is taking them trick-or-treating. Calvin replies that Mom is. Hobbes asks if Dad is staying home to give out candy. Calvin tells him Dad is going to sit in the bushes with the garden hose to drench potential T.P.ers.

Having eaten their Halloween candy, Hobbes says he feels awful. Calvin thinks if someone even mentions "Milk Duds", he'll barf. Calvin laments the passing of another Halloween. He says its always a letdown after a holiday. He decides they might as well go into town to look at the Christmas decorations.