In the "Ark", a floating city with depleted energy and strict class structure, Su Wan, a girl from a lower-class area, was marked as a "defective body" because of the genetic coding pattern under her right eye, and she lived at the bottom all day long. An unexpected pipeline inspection allowed her to glimpse the secret of the abnormal decay of core energy, and accidentally triggered an ancient resonance with the "Heart of the Ark" at the core of the city.
It turns out that Su Wan was not born with a disability, but was the only surviving perfect experimental subject E-07 from the "Key Project" that was terminated seven years ago. Her genes hold the key to restarting or repairing the Heart of the Ark. With the intervention of Inspector Lu Chen, Su Wan learned that the Ark would crash within a few months. In order to survive, she was forced to embark on a path of escape and exploration, from the chaotic "Rust Belt" into the radiation-ravaged wasteland.
Deep in the wasteland, they discovered the "Noah" base of the old era and the abandoned truth: Ark's top brass had abandoned surface humans in order to preserve the elite. Faced with internal betrayal, the external tide of mutated beasts, and the possible price of her own life as a "key", Su Wan must make a choice. Will you become a victim to save the city, or break the shackles and fight for the right to survive for all abandoned people? An epic about fate, humanity and the survival of civilization begins.
