It’s true: nothing happens by accident in life. What possible reason could Marion the key-keeper have to save an Aelian envoy who arrived at the ducal castle? Supposedly, none at all. But it turned out that he had business with her—and very important business. It concerned a mysterious magic key that the Aelians once gave her for safekeeping, and now needed back. And who will explain now why the key is so important, and what door it must open—or, on the contrary, lock? Is it true that earlier it belonged to greedy, злovicious fairies who fled from this world? And, most importantly: will Marion be able to live as before, or will she one day have to throw everything away and wander, saving the most precious thing she has in the world?