When the monsters scare off a cleaner, Kate reaches breaking point; either they clean up their own mess or get out. Eddie is desperate to tidy the house before she gets back but the monsters have other ideas.

Eddie sneakily floods the basement so that Fiend, Haggis and Norman are allowed to live upstairs with the family. But his plan backfires when hanging round with the human's too long turns the monsters into very un-monsterly, civilised grown-ups.