The martial artist Su Hua-Jen has risked his life clambering to the summit of one of the five sacred mountains of Wu Lin, only to come across two monstrous beings in battle. His timely intervention turns the tide of the fight, and unbeknownst to him, sets in motion a series of monumentally consequential events. Back in the city, Su has a more mundane problem to face—an enormous debt with the local book lender. To pay this off, he must peddle his remarkable skills as a physician. While Su would prefer to steer clear of the affairs of the martial arts world, a request from the Lord of Globe Castle is financially promising—and might gain him access to the Fantastic Academy, where he can feast his eyes on the Limitless Celestial Book. But treachery is afoot, and Su is soon drawn into a crisis that will rock the foundations of Heaven and Earth.

The heads of the six schools of martial arts do battle with the demon warrior Mo Kuei, but no sooner do they emerge victorious than a group of demons known only as "The Unfriendly" slaughter the six masters and make off with Mo Kuei's body. It is now up to a group of heros to stop The Unfriendly from using the spirit of Mo Kuei in order to gain possession of the wish-granting Stone of Heaven