In the future city "Xinhai" where memories can be read, repaired and even traded, the top "Memory Weaver" Ling Su sealed up his past due to an accident five years ago and lived in seclusion in a corner of the city, repairing the broken memory fragments. When a girl named Su Xia came to the door with the case of her brother falling into a "memory coma" (deep memory coma), Ling Su saw the same strange "echo" from the memory fragments she provided as the tragedy five years ago. In order to pursue the belated truth and save the new victims, Ling Su was forced to return to the abyss of memory that he swore he would never step into. What he will face is not only the giant enterprise "Yongzhou Group" that controls the lifeblood of memory technology, but also the cruel past of love, betrayal and sacrifice that he has buried with his own hands.