In the prosperous but undercurrent city of Xiguang, Lu Li is a unique private detective. He suffers from the "late stage of chuunibyou" and firmly believes that the world is composed of countless secret "fantasy sequences" and "laws", and that he is the chosen "sequence watcher" and shoulders the important task of maintaining the "balance" of the world. In the eyes of ordinary people, he is just a young man with strange words and deeds and an open mind; however, it is this "fantasy filter" that is different from ordinary people, which allows him to always discern the subtleties that are ignored by mainstream society, and use a logic that is incomprehensible to others to deconstruct bizarre urban mysteries.
Recently, many bizarre "abnormal events" have occurred in Xiguan City: museum exhibits disappeared out of thin air, ordinary citizens fell into collective hallucinations, and invisible shadows appeared frequently in the night. The official investigation reached a deadlock. Only Lu Li, with his unique "fantasy sequence analysis method", keenly captured the looming connections behind these events. He is convinced that a "shadow sequence" attempting to subvert the world order is quietly awakening. In order to prevent the "doomsday catastrophe" he predicted, Lu Li resolutely threw himself into this puzzle of fantasy and reality, determined to use his second-rate wisdom to uncover the ultimate truth hidden deep in the city and protect the "world peace" he understood.
