In the rain-shrouded Xinhai City, Ling Zhou, the top "memory cleaner", makes a living by erasing the pain of others, but his own past is blank. He is calm and efficient, like a cold scalpel in his hand. Until a mysterious woman named Hera brought a difficult commission - to delete a memory about the farewell at the dock. When Ling Zhou dived into the depths of that memory, he saw a scene that made his soul tremble: the man in his memory who caused Hera so much pain was actually himself many years ago. Professional principles collide fiercely with the lost self, and every exploration is like walking on the tip of a knife. He must find his own island from this ocean of memory before Hera completely forgets it.
