This is the orthodox martial arts sequel to Journey to the West, telling the legendary story of Xuanzang's master and apprentice Xitian who returned to the Tang Dynasty after returning to the Tang Dynasty to learn Buddhist scriptures, and then the Three Realms rose again. Fighting to defeat the Buddha Sun Wukong, the altar envoy Zhu Bajie, and the golden Arhat Sha Wujing protect Xuanzang and sit in the Daci'en Temple in Chang'an to protect the Mahayana scriptures. Unexpectedly, the remnant soul of the demon Buddha Wutian who was sealed thousands of years ago awakens and stirs up the storm in the three realms. Wutian's demon generals take turns harassing Chang'an, the seal of the ancient Buddha's tomb is loosened, the demonic energy in the sea of blood surges, and a catastrophe affecting the survival of the three realms quietly comes. The four masters and disciples were ordered to find the Haotian Mirror in the Heaven, the Book of Life and Death in the Underworld, and the Dinghai Pearl from the Lingshan Mountain. They gathered four treasures and laid out an immeasurable Buddha's light array to start a life-and-death showdown with Wutian. In the middle of the war, Wu Nian, a child possessed by Wu Tian's remnant soul, unexpectedly appeared, affecting everyone's fate. In the end, the four masters and disciples, with compassion as their heart and faith as their blade, completely eliminated Wutian's obsession and restored peace to the three realms. Their legend was also passed down from generation to generation in the morning bells and evening drums of Chang'an.