It tells the story of Shen Moyan, the successor of the sage of painting, who accidentally obtained the mysterious sword manual "Moon Shadow Sword Art", gave up painting and took up martial arts and hid in Jinling, becoming a middleman in the world. When he was forced to get involved in the battle for the secret treasure of the previous dynasty, he discovered that he was a descendant of the previous royal family, and his fate was intertwined with Murong Xue, who had the power of the Lone Star. The two make difficult choices between pursuing the ultimate in martial arts and surviving in the world of martial arts. Faced with the revenge of the Netherworld Sect, the struggle of the martial arts alliance, and the conspiracy of the royal family, they gradually uncover the truth behind the destruction of the Hidden Sword Villa. The work uses poetic martial arts brushstrokes to explore the eternal proposition of ideals and reality, and interprets a Jianghu legend about protection and growth in the light of swords and shadows.