In the near future, a commercial memory implant technology called "Dream Weaving" is popular all over the world. People can buy flawless happy memories to escape the trauma of reality. Memory detective Ling Feng, a "memory keeper" who insists on real pain, while investigating a seemingly perfect suicide case, discovered that there was a tiny "digital scar" hidden in the happy memory implanted by the deceased. This scar is like a thread, leading him into a huge maze woven by memories. He must rush on the boundary between virtuality and reality, fighting against a huge conspiracy that tries to control the world with false happiness, and at the same time, he must face the painful memories deep in his heart that he does not want to touch.