A snake god, prisoner in a cave since thousand years, takes possession of a man and transforms his arm in a snake. Under this form, the man rapes and kills women. Twenty years later, the man bites his own daughter, who is also transformed. With the help of her fiance, of another man who wants to marry her, and a sorcerer, she tries to struggle against the malevolent snake god.
A family moves into a house. The handyman's son tells the brother and sister there is a family of vampires sealed up in the basement. After freeing and befriending the child vampire, he uses his vampire magic to take the daughter and the handyman's son into a comic book to save a princess from a cannibal witch doctor and tribe. The witch doctor (Wu Ma) changes into the monkey king and Dracula, among others. The kids counter with their own transformations. For instance, when the witch doctor changes into Jesus, the kids chase him with a crucifix. Meanwhile, in the real world, the vampire parents are hopping around trying to find their son.
After her father, a judge, is murdered by corrupt officials, a young woman must set out do recover the Blood Rain Sword, which her father had left to her, and encounters obstacles from the villainous Chao Pai.
