Once upon time, there was an old woodcutter and his young son. The woodcutter always wanted his son to go to school but they didn't have enough money, and after a few years he had to come home. The son insisted on going to the woods to work with his father, but the father didn't think he could handle the hard work. During a lunch break, instead of resting, he defied his father and went wandering through the forest, where he heard a voice saying it was trapped at the bottom of the tree. There he saw a bottle, but when he opened it a giant demon sprang out and said it would break his neck and kill him. The young woodcutter then challenged that the demon spirit did not have the ability to get back in the bottle. So the spirit, to show that he really could do whatever he wanted, re-entered the bottle to show the boy how strong he was, and the boy stopped the bottle up again. The demon, shocked, began begging the woodcutter's son to open the bottle again, but he refused unless the spirit promised to benefit the boy.