The book ends with the protagonists planning to destroy The Grand High Witch's retainers and conquer her castle, and then use its various magical resources to systematically hunt down the unsuspecting witches of every country and rid the world of them forever. In the ending to the 1990 film, the now-good Miss Irvine arrives to reverse the mouse transformation from Luke and restore him to human form. Luke and Helga are planning to get rid of all the evil witches with the money, address, and resources that Luke stole from The Grand High Witch.