In the "Forgotten City", a future city where memories can be erased, edited and traded, the top memory restorer Lin Mo, like a soul paperer, repairs the incomplete past for clients. He is calm and distant, walking among the broken memories of others as a bystander, but he keeps secret of his own past.
One day, a mysterious woman named Xiao Lan brought a strange commission: to retrieve a memory that had been "perfectly" erased, a complete "hollow". This seemingly ordinary business actually involved Lin Mo in a huge conspiracy controlled by the giant technology company "Yongyi Company". As the investigation deepened, he discovered that the hole was not only connected to the mystery of Xiao Lan's identity, but also pointed to his dust-laden core memory. In the labyrinth of truth and falsehood, he must face the truth that he has been avoiding and that can overturn the entire world.
