Nezha saw the drought in the world and could not bear to see all living beings suffer, so he went to the water tribe to ask for punishment. At the birthday banquet of the East China Sea, he fought with Ao Bing, the third prince of the Dragon King of the East China Sea, but the demon tribe interfered and killed Ao Bing and framed Nezha. The Dragon King of the East China Sea went to Chentangguan to ask for punishment, and Nezha committed suicide on the spot to apologize because he did not want to implicate his parents. Nezha was originally a spirit pearl, and all this was his fate. Taiyi Zhenren used green lotus roots as bones and lotus leaves as clothes to rebuild Nezha's immortal body and bring him back to life, but there were two prices. First, Nezha had to enter the mortal world and find five portable magic weapons. Second, he had to help Xiaolongnu defeat the snake queen and revive the water tribe. Only in this way could Nezha pay for all his sins, return to the mortal world, and reunite with his family. Later, Nezha discovered that the drought and Ao Bing's death were the means by the Snake Queen to usurp the throne. The Snake Queen teamed up with the Demon King to imprison the four Dragon Kings, causing the Dragon Palace to change its owner, and Nezha became the king of the four seas. During the journey of searching for magic weapons and fighting against the Snake Queen's pursuit, Xiaolongnu and Nezha gradually developed a deep relationship from their original distrustful and hostile attitude. The two worked together and finally gathered the five magic weapons, defeated the Snake Queen and the Demon King, revived the water tribe, and upheld justice.