Book II: The Gate continues the story of Herbert, an unusually farsighted and curious mole with eyes that sometimes seem to reflect the rainbow. Herbert and his friends start exploring the Lands Beyond and encounter far more than they bargained for as they encounter a new friend, and search for the path that will allow them to take Clarence home. But instead of ending up in Clarence's part of the world, they find themselves in a mysterious valley with a secret that none of them could ever have imagined. Could it unlock the way for them or would it lead to their destruction? Finding out could cost one of them their life!