Huang Village suffers a severe drought, and old farmer Li Dehou encounters the Azure Dragon of the East Sea, who has been sealed for a hundred years. To save all the seedlings and people of the village, he willingly sacrifices three years of his lifespan to ask the divine dragon to bring rain. After the rain, the Azure Dragon's magical power is exhausted and falls into weakness. The greedy Wang Caizhu discovers the divine dragon and, seeking to acquire dragon scales and dragon horns, brutally harms the Azure Dragon, spreading rumors to bewitch the villagers, falsely accusing Li Dehou of harboring a monster, and driving the old man out of the village. Fortunately, a child reports the news, and the indebted Magistrate Su arrives to uncover the full truth and arrest Wang Caizhu. The evildoer receives punishment, rain falls once again, and the Azure Dragon leaves behind a precious pearl to protect Huang Village, admonishing the world that good and evil always have their retribution.