Liu Yang, an amnesia repairman, grew up from an amnesia repairman who knew nothing about himself and was emotionally introverted to a responsible and selective "memory weaver" in a world where profound memories can be condensed into "echo stones". His initial motivation was to find "who I am", which eventually transformed into an active choice of "who I want to be". He gives up the grand past he was given, choosing to bear the consequences of his actions and fight to protect the world he holds dear.