In a future city where memories can be bought and sold, top memory purifier Lin Jing's job is to sneak into other people's brains and erase painful past events. He was calm and efficient, until a digital plague called "The River of Forgetfulness" quietly spread.
It does not delete the memory, but covers it with strange geometric garbled characters, like a graffiti from an unknown dimension. During a mission, Lin Jing saw the face of his sister who had been dead for many years deep in the garbled code.
In pursuit of the truth, he embarks on a dangerous path. Behind the scenes is the technology giant "Eternal Think Tank" that controls the lifeblood of the city and the femme fatale who is both a rival and ex-girlfriend; in front of him is a terrifying existence that is awakening and aims to devour the memory of all mankind.
His only clue was buried deep in the incomplete memory of his sister that he didn't want to look back on. This time, what he wants to purify is himself.
