Itโs Halloween and the entire town is getting into the Halloween spirit; much to Zimโs dismay because he considers the entire concept to be insane and he doesnโt want filthy Earth children coming to his house. Meanwhile, Ms. Bitters sends Dib to an insane asylum because he has been acting crazier than normal, in which in truth he has been getting sucked into a nightmare world that was created due to his meddling with one of his fatherโs inventions. After finally getting out of the nightmare world and out of the insane asylum, Dib sees Zimโs house and decides to force Zim to come with him into the Nightmare world because he believes Zim will have the capability to put an end to all the madness, but will they manage to work together despite the fact that theyโre enemies and that Zim didnโt want to help him in the first place?