In New Line City, a giant city made up of living creatures, memory is the most expensive commodity and the most deadly weapon.
Ling Ye, an underground memory weaver who survives in the city's "root zone", makes a living by repairing and selling other people's pasts, but seals his own most painful memories layer by layer. An ordinary transaction allowed him to accidentally release a memory virus called "Echo Gu", which can completely erase people's minds.
The cold-blooded ace tracer Han Bing follows him, turning him from pursuer into reluctant partner. The two were forced to travel between the glittering "canopy" and the dark and humid "undercurrent", and were hunted from both sides by the city's two masters - the Yongyi Group, which monopolizes everything, and the mysterious organization "The Silent Man", which attempts to subvert everything.
When the "Echoing Poison" plague swept across the city, a shocking conspiracy aimed at formatting everyone's memories surfaced. Ling Ye must sneak into the dusty ruins of his heart, awaken the truth that can destroy him, and fight against a "god" made of memories.
Because in this ruins of memory, forgetting is not salvation, remembering is the only way to survive.
