In the ancient times, the heavens were silent, and all the worlds were left in the dust. Su Lan, who was born in the mortal world, harbors an obsession with the lost civilization, because a floating divine city - the Heavenly Tower on the other side - often appears in her dreams. An accidental change in the sky gave him a "Feather of Memories" that carried fragments of civilization, and he embarked on the road to explore lost miracles.
However, the mystery of the divine city is far from being as simple as exploring the ruins. Behind every broken wall lies the will and curse of the ancestors. Today's immortal cultivators respect the strong, but they don't know that their foundation comes from those forgotten years. Su Lan wants to uncover the lost truth and revive the glory of ancient civilization, but she attracts obstacles from the forces of the "Tianji Tomb Keepers". He must choose between the mystery of ancient civilization and the temptation of the immortal path in this world, to protect the world, or to achieve his own immortality?
This book takes the rise and fall of civilization as its bones and the wonders of cultivating immortals as its soul, depicting the echo of a civilization that spans time and space. Su Lan used her mortal will to fight against the indifference of immortality, struggling between truth and faith, and igniting the fire of hope deep in the ruins. What is lost is not only the ancient glory, but also the unyielding questioning in everyone's heart.