The Xiao's Song Through the Ninth Heaven

Feng Yuying, a mortal girl born with an extraordinary Celestial Sound Spirit Body, devotes herself to mastering the xiao flute in the Cold Jade Cave of the Lingxiao Sect. Through rejection and hardship, she gradually comprehends the nine levels of the Way of Sound. Breaking free of worldly constraints, she traverses mountains and rivers, braves the Sea of Thunder, and ascends to the Ninth Heaven to establish the Heaven of Absolute Sound, wielding musical principles to command the laws of the universe.

As the ancient seal weakens, an ancient Heavenly Demon breaks through the boundary, and the power of annihilation sweeps across the three realms, plunging all living beings into an apocalyptic calamity. At the brink of life and death, Gu Qingxian, the soulmate whose music has resonated with hers across the void for ten thousand years, descends from the sky. The zither master protects, while the xiao master attacks. Following the fated path of their ancient ancestors, the two join zither and flute to face the Demon Lord.

After tracing the origins of time and clashing over the Great Dao, the two join forces to end an ancient calamity and save the people of the three realms. But the laws of Heaven cannot be defied: two supreme Great Daos cannot coexist in one world. In the end, the zither terrace and the Heaven of Absolute Sound face each other across the distance, their zither and flute melodies answering across the void. The two soulmates bound by fate are near in heart yet worlds apart, leaving behind a heartrending final song.