Three thousand years ago, at the end of the Shang Dynasty, the tyrant King Zhou (played by Tony Leung) was bewitched by his evil concubine Daji (played by Fan Bingbing), and joined forces with Shen Gongbao (played by Louis Koo) to try to summon the power of darkness to bring down a black dragon that would destroy the world. For a time, evil spirits were rampant, and the people were living in misery... In order to stop the tyrant from destroying the world, Jiang Ziya (played by Jet Li) ordered Lei Zhenzi (played by Louis Koo), Nezha (played by Wen Zhang) and Yang Jian (played by Huang Xiaoming) to join forces to find the Sword of Light to slay the demons and help King Wu lead the Xiqi army to attack Chaoge. Unexpectedly, Daji cast a spell that caused Jiang Ziya to be cursed for his rebirth, and the battle of Chaoge was imminent. The arrival of the black dragon was a foregone conclusion, and the world was once again in crisis...