In the new Kyoto of 2242, memory is the most expensive commodity.
Kaito, a memory appraiser in the Diyuan District, makes a living by interpreting the residue of other people's memories. He was cynical and only believed in transactions, until a strange commission dragged him into the abyss - a "virtual memory" that was perfectly erased by man.
In order to find out the truth, he formed an alliance with the mysterious woman Yuna and embarked on a desperate road. From the sinister streets with flashing neon lights to the floating cities hanging high in the sky, the shadow of the giant enterprise "Time Series Technology" is everywhere, and deadly pursuits follow it.
The forgotten past, the tampered future. When a memory weapon called "Forgotten River" is about to cleanse the entire world, Kaito must make the final choice between regaining his identity and saving the fate of countless people.
This time, what he was appraising was not other people's memories, but his own soul.
