Prince Agib hears the tale of a boy confined to an underground chamber for forty days, and dismisses it as superstition.
Prince Agib has toppled a vast brass statue of a horseman upon the Black Mountain, a labour for which he has been rewarded with the ship he needs to find his way home. Stopping off on a remote island, he sees a boy being led into an underground chamber, and when the coast is clear, Agib follows him in, eager to hear his story.