Aku, a 16-year-old genius boy, was discriminated against and excluded in school because of his poor family background and withdrawn personality. After being humiliated by Zhang Hao, a rich man, in the library, he fled back to his dilapidated home on the edge of the city. However, in the bathroom mirror, he saw a completely different version of himself - a "shadow" with a sarcastic smile and an independent consciousness.
The "shadow" in the mirror told him that he was not alone. Outside the real world, there is a "mirror world" that coexists with it but is completely different. There are emotions and memories abandoned by the real world, but there are also "radicals" trying to subvert reality. And Aku is actually the key "bridge" connecting the two worlds.
What shocked him even more was that his father, Mo Yuan, who "passed away" due to a laboratory accident, had explored the mirror world in depth and left a notebook full of mysteries. The death of his father does not seem to be an accident, but is closely related to a conspiracy called "Broken Mirror" in the mirror world.
When the malice of the real world intersects with the threat of the mirror world, when trust and betrayal swing between light and shadow, can Aku uncover the truth about his father's death? Can he find the meaning of his existence in the gap between reality and mirror image? And what is waiting for him behind the mirror, is redemption or a deeper abyss?