In the "Shadowless City" where memories can be erased and reshaped, Lin Mo, a top memory adjuster, makes a living by erasing the pain of others, but cannot retrieve the memory of his missing sister. A seemingly ordinary commission involved him in a conspiracy that he could not turn back from. The client Gu Yan asked to delete an irrelevant memory of a rainy day, but Lin Mo caught a glimpse of the hummingbird pendant belonging to his sister that he had been looking for for many years in the depths of his memory. In order to pursue the truth, Lin Mo secretly copied this forbidden memory, but found himself on an isolated island built of lies, surrounded by a sea of oblivion that could swallow everything. He must recover the tampered past in the whirlpool of identity, emotion and truth.
