In Xinhai City, memories can be stripped, stored and traded. Lin Mo is a "memory scavenger", and his job is to repair and clean up those abandoned memory fragments. He is used to wandering in other people's past, but he knows nothing about his own past. During a routine mission, he accidentally came into contact with a broken memory core, a vision of a lighthouse that belonged to no one but was extremely familiar, and he was involved in a huge conspiracy. In order to find the truth, Lin Mo had to dive into the deep sea of memory and salvage the secrets deliberately buried by the giant company "Yongyi Technology". He will discover that each forgotten moment holds the only key to the puzzle of his own existence.