A washed-up private security agent has to escort a valuable Chinese antique out of Shanghai but is ambushed en route.

On their journey to the west, Tang Seng and Sun Wukong have a falling out and set out a challenge for each other. Sun Wukong agrees to give Tang Seng his magical powers in exchange for Tang Seng's appearance and learning. The challenge they set is to bypass the Seven Spider Sisters and defeat the Hundred-eyed Demon Lord within seven days. After the swap, who will have the determination and wit to win this challenge?

The film tells the story of the monkey Sun Xiao Tian who accidentally came to the world ten years later due to a sudden mysterious fire.

In the city of Suzhou, the demon seized the rule, the mage protected the people, and opposed the demon clan, but overnight, with the unidentified millennium green snake emerged, the monsters died mysteriously, and humans were also panic-stricken. The new mage Fan Hai shot down the demon, but unexpectedly discovered the secrets of the monsters encircling the millennium snake demon. For a time, the wind of Suzhou City was surging, and the terrifying conspiracy hidden behind "peace" surfaced.

The film tells the story of the demon ancestor who has grievances in the world is about to appear. In order to defeat him and save people, Dongfang Mo (Lin Yu decoration), Ting Ting (Yi Zhengfu decoration) and merit master (nine hole decoration) are looking for The incarnation of the god monkey-Sun Xiaotian (Xie Miao).

Sun Xiaotian who recovered the mana, began a spiritual journey with Dongfang Mo,Yang Jiuli, and Ting Ting. They traveled all the way west, passing through the Ewha City in the Black Bone Mountain of Xiaomanguo. Under the guidance of strange crying, they rescued Su Luoying, the daughter of the "black wind old demon" in the legend of Ewha City. Sun Xiaotian met Su Luoying's princess Huo Fenghuang in the process of helping Su Luoying to resolve his internal resentment. Sun Xiaotian and his team found the sleeping black wind old demon together with Huo Fenghuang. Unexpectedly, things are here, far from over, the real behind-the-scenes master of Ewha City has someone else.