Four of the seven Trustees have been defeated and their Keys taken, but for Arthur, the week is still getting worse. His friends have been captured by the Piper, and Arthur's New Nithling army still controls most of the Great Maze. Meanwhile, Superior Saturday is causing trouble whereever she can, including turning off all the elevators in the House and blocking the Front Door. Amidst all this trouble, Arthur must weigh an offer from Lady Friday that is either a cunning trap for the Rightful Heir or a golden opportunity he must seize - before Superior Saturday or the Piper beats him to it. The race to find the secret of the Middle House is on!