In the futuristic city "New Arc City" soaked in neon and acid rain, memory has become a commodity that can be read, tampered with and traded. Ling Su, a former top "memory stalker" in the company, is now a private reminiscence expert walking in the gray area. He can sneak into the brain data of the deceased and reconstruct the last fragments of their lives. When a mysterious and elegant lady, Ye Sheng, comes to the door with a bizarre commission, Ling Su's peaceful life in exile is completely shattered. The target of the commission was the chief scientist of Tianqiong Technology. Officially, he died of suicide, but Ye Sheng firmly believed that it was a murder. What Ling Su needs to infiltrate is not an ordinary memory video, but an extremely unstable mental fragment called "reverberation". In this corridor of data and obsession, every step could lead to him being lost forever. The price of the truth may be far beyond his imagination, and his own dusty past has also quietly awakened in this deadly sneak.