There are billions of galaxies in the universe. The three realms of heaven, earth and man are a medium-sized space with rich resources and huge spiritual power, which attracts the prying eyes of creatures outside the three realms. In order to protect the three realms, Panlong awakens, with the master as the vanguard and the great sage as the soldier. As a backing, the cosmic battlefield was opened, blocking the unknown demons that invaded the mysterious space from the Three Realms, and providing a rich energy source for the Three Realms. Countless saint-level Western Expeditionary Forces were born, and the guardians of the battlefield were launched, all of whom were ants under the saints.