After his grandfather disappears, a young boy sets out to save his family home from emerging real estate developers. Arthur learns that he must follow his grandfather's ancient clues to a vast treasure – and unlock the passageway to a spectacular new world filled with mysterious little people, so tiny they are considered invisible, and enlist their help. But once in the magical land, Arthur must join swords with a beautiful princess and a reckless army of defenders to save the land from the evil wizard. It seems like an impossible task, but as he discovers along the way, sometimes the smallest heroes can make the biggest difference.