The story takes place in a cyberpunk world where memories can be bought and sold. The protagonist Ling Feng is a memory retrieval expert at the bottom. In order to save his sister Ling Xue who suffers from a rare mental illness, he does not hesitate to sell his memory in exchange for medical expenses. During a high-risk mission for Ye Xiao, a member of the mysterious organization "The Forgotten", he accidentally discovered that his sister's illness was caused by the "Leviathan Project" of the monopoly company "Yongyi Group". The plan is to enslave humanity through memory manipulation.
From being trapped by money to avenging family ties, Ling Feng's worldview was completely overturned. Under the guidance of Night Owl, he went deep into the tiger's den, from the black market bar in the subsidence zone to the strict data center of the Dome City, and uncovered the truth step by step. He discovered that the so-called antidote catalyst must be obtained from the core server "World Tree" at the headquarters of Yongyi Group.
In the end, Ling Feng and the "Forgotten Ones" launched a general attack on the Yongyi Group. In the spiritual duel with the group CEO Arthur Crowell, Lingfeng destroyed the "World Tree" system at the cost of his most precious, last memory of his parents, and made the truth public. He successfully saved his sister and the world, but lost his past forever. At the end of the story, the recovered sister actually drew his lost memory, leaving an open suspense about the nature of memory.
