The little girl Bai Nuo, who is suffering from an incurable disease, travels to and from the human world through the "Lake in the Lake" passage in the Paradise World under the leadership of the little boy Ah Wu. The world of bliss and the world of extreme sorrow. In Elysium, Bai Nuo knew that Ah Wu was actually the fifth prince of the Lake Kingdom. Due to the narrow-mindedness and selfishness of Hu Nu, the manager of the Lake Kingdom, Elysium was facing a fight between the princes. In order to find a way to return to the human world, Bai Nuo began his adventure in the Paradise. Bai Nuo met the magical Jade Spirit Rabbit, the kind dwarf in the underground city, Baimi Beach, the fairy baby in the Ghost Manor, the Thief King's castle, and even the world of extreme sadness. Wu Po finally understood the joys, anger, sorrows and joys of the three worlds through the magical "mirror of divine knowledge", felt the love and hatred of the three worlds, and skillfully used the power of love to resolve the tense internal battles in the Paradise World and the long-standing cruel vendetta in the Extreme Sadness World. Love ended the war, but love could not keep Bai Ruo, because Bai Nuo's love was divided into two different spaces, and she could only choose one of them.