**Sunlight dies, oxygen is sin. ** Under the doomsday dome "Eden" of the Eclipse Era, every breath is taxed. The Pure Qi Council uses "breathing tax" to divide classes and uses "cognitive rust" to grind thoughts. Isaac, a former elite member of the Iron Lung Guard, was burdened with the sin of experimentation and died for medicine in the burning pain of the neural network. Memorydigger **Lilia** fights the information plague with resistance and unearths the truth that the Parliament uses oxygen to "screen" human nature.
The two collided in the twisted fusion ceremony of the Flesh Evangelical Sect, and were involved in the "anaerobic evolution" preached by leader Charon. The fusion of the chips triggered a storm, leading to a ruthless sweep by the Iron Lung Guards. During the escape, the last words of the abandoned ecological park were revealed: the Eden Oxygen Cycle was a slaughterhouse from the beginning. Charon died in a sniper, and his last words "The key... Is in you" pushed Isaac into the abyss.
A blood-stained "Eye of Thorns" experimental label and a cold metal cube pointed at the transformed girl **Anya** in a strange resonance. Is this the forbidden key that leads to the core of the Ark and shreds the final conspiracy? Amidst the oxygen of betrayal and the knowledge of rust, can the survivors pry the key of silence and play the last lament of life in the steel tomb?
