In a future city where memories can be edited and repaired, Ling Su, the top memory restorer, is a "hollow man" with no past. Day after day, he repaired the broken lives of others, but he could not remember the face of the woman in his dream. A mysterious commission that requires the complete "erasure" of a memory draws him into an out-of-control whirlpool. The data fragments in the commission surprisingly overlapped with his lost past. In order to find himself, Ling Su decided to go upstream and sneak into the core of this tightly protected memory. He will discover that the truth is an isolated island, and what is forgotten is the vast ocean that can overturn the entire world.
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