In the year 2099, when memories can be stripped away and traded, New Kyoto is shrouded in eternal neon night. Lin Zhou, the former "Panshi Group" elite and now the "echo cleaner", specializes in dealing with the dangerous mental pollution "echoes" that remain after the memory is stripped. A mysterious commission drew him into the whirlpool: Su Wei, an upper-class woman, claimed that she had lost a memory that should not exist. The journey to pursue this memory fragment not only revealed the inhumane experiments behind the Panshi Group, but also forced Lin Zhou to face the most painful echo of his sister.
