Achieving the Dao of Bygone Days

Zhao Qiu keeps repeating the same dream.

In the dream, seventeen hundred years ago, the world's spiritual energy was like an ocean, immortal traces and Dao shadows filled the sky, and countless methods shone together like the stars.

When he wakes, he sees only the modern age with its exhausted spiritual energy: forests of buildings and the clamor of department stores, while cultivators wearing iron buckets struggle to throw out talismans that drift down crookedly.

His body is trapped in an age of waning laws, but his soul travels every night to that flourishing immortal world. In his dreams, Zhao Qiu transports immortal techniques and studies those long-sealed, heaven-reaching secret arts.

And soon Zhao Qiu discovers that it seems as long as he changes a cause in his dream, it can affect the effect in the time he currently inhabits.

Just like how a butterfly flapping its wings in a dream from ages past lets the era of declining laws glimpse another dream.