Fahai manages to trap Susu in the temple of Lei Feng Pagoda. Susu blames this on Fahai, after which they have one last battle. Meanwhile, while Qingqing is exploring the city, she came across Neng Ren and decided to help him subdue the bat demon by revealing its location. They are confronted by Fahai, who tries to explain to them that the spell should not be broken before it is complete. As the pair go to kiss one last time Susu is sucked back into the temple, leaving Xu Xian chasing her as both cry and reach out for each other. In the meanwhile, after a series of pranks, Xu Xian recognizes Susu and they spend the night together, which is rather unfortunate for Xu Xian because he does not know that he was making love to a snake in a human form. Throwing him an apple to eat Fahai tells him that his new look suits him, and they continue on the journey together again.
Fahai and the other monks capture Xu Xian and prepare to cast spells to banish the demons from his body. Soon, Xu Xian wakes up and tells his friends about being kissed by a beautiful girl, which only makes them laugh. Susu fights the battle in her snake form, but is stabbed by Xu Xian unaware of her true identity. Neng Ren defeats the bat demon's cohorts, but is unable to subdue the bat demon king who bites him. But Susu misunderstands his intentions and the two sisters start battling Fahai. At Lei Feng Pagoda, Neng Ren transfers the ice harpy from the demon trapper into the magic circle, which holds other trapped demons in it.
He looks up at the sky and questions whether he was right to have been a demon hunter all his life. Though he is subsequently saved by Fahai, Neng Ren starts turning into a bat demon himself the next day and decides to run away. Qingqing, being a playful snake, scares Xu Xian causing him to fall into the lake below. Shortly thereafter Fahai finds Xu Xian and after seeing a mysterious substance in his medicines he gives Xu Xian a spirit blade. She kisses him, causing him to remember everything. As he looks around he sees Neng Ren helping to save his former colleagues, the monks of the temple who were trying to complete the spell to release Xu Xian from the demons.
After this, we see Xu Xian picking herbs around the temple and inside Susu has returned to her true form as a white snake trapped inside the temple. Susu recovers and she goes to find Xu Xian along with Quinqing. Susu is pursued by Fahai, who tells her to leave Xu Xian. On the other side of the mountain, two snake demons Qingqing and Susu are playing around, enjoying their time when they spot a physician, Xu Xian, picking herbs at the foot of the mountain with his friends. Starring Jet Li Eva Huang Raymond Lam Charlene Choi Wen Zhang Vivian Hsu The film starts with Abbott Fahai and his assistant Neng Ren heading towards a snow blizzard through a magical door.
Neng Ren is found by Quinqing and the two befriend each other. . Helped by Susu's friend, a mouse, Xu Xian manages to retrieve a root kept inside the Lei Feng Pagoda that could save Susu, but is possessed by demons as a result of this. Susu starts thinking about the day she kissed Xu Xian and decides to head to the city to find Xu Xian. After finding a victim of a bat demon, Fahai and Neng Ren leave the temple immediately to subdue the bat demon to avoid more casualties. Fahai is seen walking the mountainside when suddenly Neng Ren now a complete bat demon appears alongside him. She tells him that it was all worth less than a moment with him.
They realize that Neng Ren, despite becoming a bat demon, still has all his human taste for human food, and most of his human qualities. She doesn't, which causes Fahai and his disciples to invade her and Xu Xian's cottage. Susu, being the gentler snake, assumes human form and kisses Xu Xian which allows to flow from her into his body thus saving him. Meanwhile Xu Xian and Susu wed. Filled with the divine spirit, he lifts up the pagoda to allow Susu's last wish to come true. At this point, Susu repents and asks to see Xu Xian just one last time.
Qingqing, watching all this from a distance with Neng Ren, tells him that she doesn't want to love anyone as her sister loved Xu Xian, and leaves saying that he will never be a true bat demon anyway. She then reveals her past and reasons to kill all men. Simultaneously, Fahai gets the answer to his question and understands what he must do. An ice harpy appears at the top of the mountains and turns the impetuous Neng Ren into an ice statue. Susu releases Xu Xian from the spell after which Xu Xian does not have any memory of Susu. Neng Ren is then tasked to confine the ice harpy at Lei Feng Pagoda, and the master and assistant head back to the door which disappears after closing behind them. Xu Xian came across them and offers a boat ride to the city.
The battle ends with Fahai capturing the ice harpy using a demon trapper, which releases Neng Ren from ice. After countless wounds Fahai lies back exhausted. After a brief reunion with Xu Xian, she tells him of her story of having meditated for a thousand years before she met him. Unable to persuade the ice harpy to turn over a new leaf, Fahai is forced to fight the ice harpy. . .
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