Lazy and selfish Taro loves to eat and sleep and wrestle with the animals. With no direction in his life, a wizard appears that gives him a special potion. With this potion, he gains the strength of a hundred men - but he can only use it when he is helping others.
Taro learns that his long-lost mother was turned into a dragon, and he is suddenly given a purpose in life. He must track down his mother and free her from the spell, all the while trying to help the peasants of his village.