In the third year of nuclear winter, three hundred meters underground, humanity’s last genetic vault is awakening.
Eighteen-year-old Gu Lingjue struggles to survive alongside his younger sister inside the Ark Core System left behind by their mother.
This underground city, rebuilt with Nazi black technology from World War II, is both a sanctuary and a living laboratory. When they repair the water purification system, fragments of their mother’s erased memories appear in the ice crystals. When fungal tendrils spread across the ceiling, German alarms from 1943 resonate through the ventilation shafts alongside the snarls of zombies.
In this breathing tomb of steel:
- Acid rain corrodes not only the surface, but also the hope in survivors’ eyes.
- The woman with military prosthetics brings not reinforcements, but a kill order from the Lazarus Project.
- Every piece of apocalypse technology they unlock brings them one step closer to the genetic sacrifice their mother planned.
Gu Lingjue gradually discovers that the neural interface in Yingxue’s mechanical exoskeleton connects not only to living metal deep in the mantle, but also to the consciousness of a Nazi officer from seventy years ago.
The antibodies flowing through their blood are nothing but the final key to launching the human extermination plan.
When the night of the twin moons arrives:
- The fungal mat network murmurs secrets of the Third Reich.
- Clones with DNA identical to the siblings emerge from the cryogenic pods.
- The Ark Core finally issues its ultimate directive: “One of the twins must die.”
At this moment, Gu Lingjue holds his dagger to his sister’s throat. From deep beneath the crust comes the last line of their mother’s recording: The one who survives is the real experimental subject.
