In Xinhai City, memories can be extracted, traded or even erased. "Memory Weaver" Lin Mo was once a legend in the industry, but an accident forced him to seal up his past and run an inconspicuous memory repair shop in a corner of the city. One day, the mysterious woman Su Wanqing came to the door with an impossible task: to retrieve a deeply locked memory whose contents she didn't even know. This commission was like a boulder thrown into dead water. It not only involved Lin Mo in a huge conspiracy involving top power and forbidden technology, but also forced him to face again the night when he lost his beloved and fell apart. In the intertwined lies and truth, he must find the echo that belongs to himself and everyone in the ashes of memory.