After Pangu separated heaven and earth, the consciousness of the gods awakened, and the deities of the world gradually divided into different factions. Among them, the Western Spiritual Mountain led by Tathagata and the Eastern Heavenly Court led by the Jade Emperor were the two most powerful factions. Throughout the long passage of time, the covert and overt struggles between these two factions never ceased... 　　The story returns to the master and his three disciples: 　　The scripture-seeking team faced an unprecedented crisis of trust, with an atmosphere of "Infernal Affairs" lingering relentlessly. After Tang Monk was captured, his three disciples fell into endless disputes. Unintentionally, Sha Seng revealed a secret buried deep in his heart: Originally a half-demon, he was nearly injured by the celestial beings of the Heavenly Court in his youth due to his aggressive and combative nature. Fortunately, he was saved by the Arhats who subdued the dragon and tamed the tiger, and from then on, he followed them to learn their skills. Eventually, he received an S-level critical mission from Tathagata Buddha: to infiltrate the Heavenly Court as an undercover agent and assist the future Western Star, the Stone Monkey Sun Wukong. Unexpectedly, the incident of the mole alarmed the Jade Emperor, and Sha Seng was banished to the mortal realm... 　　To find Tang Monk, the three disciples resolved their "misunderstandings" and joined forces. Under "covert" guidance, they arrived at a distant, alternate dimensional space, where they were informed that only by breaking through the Four Evils Palace, guarded by the Four Heavenly Kings of the Netherworld, could they shatter the barrier formed by mysterious forces and rescue Tang Monk. Little did they know, behind this lay a "colossal lie" spun by the leader of the most mysterious and elite Tai Sui Special Forces for personal gain... 　　Meanwhile, Sha Seng, who had always been diligent and honest, encountered a romantic and tender love for the first time, facing a difficult choice at the final moment... Synopsis quoted from Douban: https://movie.douban.com/subject/26348959/