In Xinhai City, memory is a commodity that can be extracted, traded, and implanted. People in the upper class buy the wisdom of the elite, while people in the lower class sell the memories of their loved ones. Gu Chuan, a memory mediator entangled in the past, wanders in the decaying gray area of the city.
A mysterious commission from uptown dragged him into a fatal whirlpool from which he could not turn back. The client is the beautiful and dangerous noblewoman Su Wan, and her goal is to find the last memory of her missing husband, the chief scientist of the technology giant "Yongshengtang".
As the investigation deepens, sin under the neon lights and hypocrisy in uptown intertwine into a giant web. Chases and killings ensue, and it is difficult to distinguish between friend and foe. What's even more frightening is that Gu Chuan discovered that the truth he was pursuing was closely connected with his dusty past; and the ultimate purpose of the conspiracy that could subvert the entire city was to devour everyone's "self."
When memories can be tampered with and identities can be reshaped, how do you prove that you are still you? In this city lost in other people's memories, Gu Chuan must make a choice: to recover his past, or to decide everyone's future.