In the New Arc City of 2242, a future city shrouded in steel and neon, human civilization maintains a fragile balance under highly developed technology and strict social control. However, a mysterious signal called a "Lullaby" quietly circulated in the city's underlying network, awakening long-dormant secrets.
Case, an ordinary archivist, accidentally came into contact with the "Lullaby" and was involved in a conspiracy that spanned a thousand years. And Ling, a young man with special abilities, gradually awakened in the medical observation room and found that he had an inseparable connection with the "Lullaby". The two people seemed to have nothing to do with each other, but under the influence of fate, they became the targets of the Management Bureau.
The Administration, a huge organization that controls the city's information and order, has hidden plans at its top. They try to control "Lullaby" even at any cost. And the "Watcher" is a mysterious being who seems to know all the truth, but is secretly guiding Case and Ling.
As the truth of the "Lullaby" gradually emerged, Keith and Ling discovered that it was not only a piece of music, but also the legacy left to future generations by the "Creator" civilization, and the ultimate code about life, the universe and the future. And they are the chosen "resonators" who shoulder the important task of determining the fate of mankind.
In a world where lies and truth intertwine, they must find each other, uncover the secret of "Lullaby", fight against the pursuit of the Authority, and at the same time face their own inner fears and struggles. Because, once the "Lullaby" is fully activated, mankind will usher in the future
