In the future city "New Green City" where technology and neon are intertwined, memories can be read and even stolen.
Lin Mo, a young man who can talk to the "echoes" left on objects, is forced to step out of his hiding place in order to find his missing sister. He discovered that a conspiracy called the "White Slate Agreement" was spreading in the city, and countless people were becoming "blanks" who had lost their joy, anger, sorrow, and joy.
Joining hands with the mysterious cybernetic hacker Xiao Tong, they sneak into the black market of memory, break through the torrent of data, and step by step towards the center of the storm - the Eternal Group that controls everything. When the truth is revealed, he discovers that his sister's fate is the key to maintaining this false utopia.
Should we choose to let the world indulge in carefully manicured happiness, or wake up everyone and let them face a complete life including pain?
A person's memory, the fate of a city, and a war about what makes us human have begun.
