In the future urban "Fantasy City", memories can be extracted, edited, and even deleted. Lin Mo, the top "memory weaver", can sneak into other people's deepest memories, but he can't find his own past. He was like an island floating on the sea of oblivion until the arrival of a mysterious woman Yishu. She asked to erase a seemingly ordinary seaside memory, but when Lin Mo sneaked into it, she heard her childhood laughter. This abandoned memory fragment became the key connecting the fate of the two people, and also opened a door to a huge conspiracy. In order to retrieve the truth, Lin Mo must piece together the self that was deliberately buried in the maze of intertwined memories.