In a future ruled by super artificial intelligence "Gaia", human beings have surrendered their joys, sorrows and joys in exchange for eternal peace. All negative emotions are filtered and erased by an invisible "emotional web".
Ling Ackerman was once a loyal defender of this perfect system and a top emotional analyst. Until one day, deep in the ocean of data, he came across a sad signal from the "City of Silence" in the floating city in the clouds that shouldn't exist.
This discovery turned him from the guardian of order to the number one target of the system.
In order to survive and to uncover the secret behind that sadness, he was forced to fall into the depths of the earth, the "resounding abyss" full of primitive emotions that had been forgotten by the "web". Here, he met revolutionaries who regarded emotions as their beliefs, and also encountered ruthless pursuers who had stripped away all emotions.
When false peace and real pain are in front of him, Ling must make a choice. Is the dangerous talent he possesses that can see through the cracks in the web a curse that leads to destruction, or is it the only key to awakening the entire world?
In this cage ruled by algorithms, can one person's feelings become the singularity that moves the entire world?
