Deep in the maze where ruins intersect with light and shadow, Yunxi uses the heart of the nuclear reactor as her mark and moves alone in a world ruled by shadows. She is neither a chosen one nor a savior. She is just a girl abandoned in the radiation wasteland, but she uses her fission will to fight against the divine power of the Mechanicus Order. Every crack in the lost city hides energy and curses. Yunxi uses darkness as fuel to chart her own survival trajectory. She longed to pursue the lost purifier, but found that her existence was the tipping point for the collapse of the lost city. In the triple whirlpool of power, technology and humanity, Yunxi chooses to remain unyielding - she wants to ignite the fire of rebellion belonging to a girl at the boundary between nuclear light and shadow. The legend of nuclear power is no longer a myth, but a true poem of a girl's counterattack.