It starts off with a boy escaping punishment from his mother via a secret passage to a cavern...
Years later, when the boy is a young man, his mother is making them move for away. As he packs up his belongings, he is distracted by a rabbit bounding off towards the village. Once there, he is confronted by a group looking to go on an short adventure, led by a wiseman . Hoping to make his last day in his hometown a good one, he accompanies them.
They make their way to a market house at the end of a valley, where the young man had been employed previously, but they must make their way past the valley, and the wiseman discovers that it's blocked off only by a wall of the market. Unfortunately for the market owner, one of them barrels through rows of stock, then breaks through the wall. Not wanting to be stopped, they ran through.
The group happens upon a cave, and enter it as directed by the wiseman. The journey here becomes quite dangerous, with the final section requiring them to walk across the top of stalagmites that project upward out of a searing-hot spring.
Once in the final room of the cave, they discover a door at the top, much to their surprise. The young man stands, almost in a trance, at the entrance to the final room as memories from his late father fill his mind. He begins to manipulate hidden switches throughout the room, causing fire to rise from all sides, finally resulting in a major quake.
Outside, light begins to fill the area around the hill containing the cave, and the quake causes much of it to collapse. After the dust clears, a castle is revealed, and the song familiar to everyone who remembers the old kingdom that resided in the area is played from the bell towers. They exclaim, "The king has returned!" and run to the castle to greet him, only to come upon the young man. After an awkward pause, someone familiar to the old king says, "You look just like him... You must be his son!" The people rejoice, as the old kingdom can now be restored.
Once sat upon the throne, the young man realizes that this cavern of his youth was the throne room of the old castle. He also found out his father's death led to the collapse of the old kingdom, and his that mother wanted to keep him isolated from anything involving it.