Prince Demin of the Ocean Kingdom and Princess Zhang Yabao of the Baoling Kingdom were childhood sweethearts. After Demin abdicated the throne to his elder brother Fengyun, Fengyun's marriage proposal to Baobao was rejected, leading him to wage war. With Demin's help, Baobao overcame dangers and finally found the luminous cup she had lost as a child. With the help of the Cup Fairy, she was able to restore her kingdom. Baobao and Demin merged their two kingdoms into the Ocean Treasure Kingdom, and thereafter celebrated peace and prosperity together.