In the Liulic City shrouded in eternal acid rain, memory is a currency that can be traded, a barrier that divides classes, and also the power in the hands of the rulers. The rich buy happiness, the poor sell their past.
A man codenamed "Zero" woke up in the filthy bottom of the city with a blank mind. He didn't know who he was or where he came from, like a ghost formatted by the world. In order to recover his identity, he was forced to step into the bizarre memory black market and form an alliance with the mysterious memory merchant Ye Xiao. He used his own body as a container to experience the memory fragments that did not belong to him - the bravery of the soldier, the tenderness of the artist, and the cunning of the criminal.
Every experience is a personal adventure; every pursuit brings him closer to a terrifying conspiracy that can subvert the entire city - the "Godhead Project."
In this maze of memories, his only way out is to become everyone's echo and then make his own voice.
