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As the Demon King Baize is on the verge of awakening, the immortal disciple Mu Qing sets out to the demon realm before the chaos spreads across the three realms, seeking the magical instrument Qingluan Mirror to slay the Demon King. By a twist of fate, Mu Qing embarks on the journey with the little demon Chaoyan. During their adventure, they grow to know and love each other. Just as they are about to fulfill their mission, Mu Qing discovers that Chaoyan is the reincarnation of the Demon King, marking their relationship with a destiny of tragedy despite their deep bond across two lives....

The Dragon King and the Four Seas Dragon King flood Chentang Pass to force Li Jing to hand over Nezha. After Nezha kills himself and his mortal body dies, Taiyi wants to build a temple to help him be rebirthed. Taoist Ran Deng presents Li Jing with the exquisite pagoda, saying that if Nezha accepts the incense without merit, he would be attacked by the devil's heart. Li Jing cannot bear to let Nezha go astray and decides to destroy the temple to make Nezha misunderstand, while Li's mother and Taiyi secretly enshrines Nezha's tablet. The Dragon King makes a sneak attack when Nezha is resurrected, and everyone is trapped under the pagoda. The father and son, who has a deep misunderstanding, are attacked from both sides. While fighting each other, they also have to be wary of attacks from dragons and monsters in the pagoda. They decide to put aside their grudges and escape from the dangerous place. As the two enter the depths of the pagoda, hallucinations come one after another, and enemies lurking inside are ready to attack the exhausted father and son at any time. The two of them finally settle their differences and defeat the Dragon King together....