 A weird annual tradition in Josef s kingdom is to repeat his crowning and knighthood in the order of the vertebrates (done by himself). However this 24th edition is in danger of getting canceled when the mother of the devil smells a rat- well actually she smells cheese when none is to be seen, which can mean only one thing: the Invisible Emperor (in Dutch  Onzichtbare Keizer , hence the title), who lost his empire (in the sense of not being found again) and since only eats cheese and bites everyone. Once more it s Kulderzipken who thinks of a way to deal with the assailant and saves the festive day.