Cartman is told that he has bad vision and has his eyes dilated; he is later given a pair of thick-rimmed glasses which are then stapled to his head so that he cannot take them off.
Later, he and the other boys discover that Chef has quit his job at South Park Elementary and has been replaced by Mr. Derp, a cliché cartoon character who tries (and fails) to win them over with his poor slapstick comedy gags.
Not wanting Chef to go too, the boys seek advice from Mr. Garrison, who suggests that Veronica is a succubus, a demoness sent from Hell to prey on and suck the life out of men.
She manages to convince them that she is not a monster but, just as she is about to leave, suddenly takes on a demonic face, laughing maniacally and declaring that they cannot stop her from marrying Chef.
When the tape gets jammed, she peels off her human disguise and reverts to her true shape—a bizarre, red-eyed, bat-winged, witch/hag-like monster—flying around and wrecking the church (and killing Kenny in the process).
Parker and Stone say in the DVD commentary that the sketch involving the Loch Ness Monster was the inspiration for the character Chef.