During their global journey, Sanmao, Xiaolali, and Qiaoqiao are led into a mysterious world by a tusk. The boundless scenery of the primeval forest makes them forget their misfortune of being stranded, and they begin to enjoy the pleasures of travel. Suddenly, a deer-horned rhinoceros appears and chases them frantically. At the critical moment, a mysterious girl named Gang swiftly resolves the crisis for them and unexpectedly discovers that Sanmao and the others are actually the chosen sword warriors of the Purifying Demon Blade...