In the sandy sea of the Western Regions, young Lu Xun made a living by scavenging. He accidentally found a volume of the book "Danqing Arhat's True Business Sutra", and since then embarked on the path of spiritual practice of "imagining the murals to condense the Dharma patterns, and gathering the will power to build the foundation of the Tao". He broke into the Thousand Buddhas Cave, met Ah Yue, a remnant of the Shahai Sea, met a crazy painter, and learned magical powers such as Feitian and Vajra in the secret realm of murals. Faced with the prejudice of Taoism and Buddhism in the Central Plains, the covetousness of the Fire Worshiping Demon Sect, and the shadow of the ancient "emptiness" catastrophe, he transformed from an orphan at the bottom to the leader of the anti-demon alliance. Explore the Kunlun Immortal Mansion, gather the Five Elements Spiritual Beads, and guide the Buddhist music on the other side. Using the power of wishes as the blade and the Heavenly Book as the guide, we finally build a protective barrier in Dunhuang, start a new journey in the sea of stars, and compose a legend of Buddhist music in the sand sea about persistence, inheritance and protection.