When an alien fleet bears down on the Solar System, humanity’s last line of defense isn’t its active-duty military. It’s the Nantianmen Project, secretly launched ten years ago.
Seventeen-year-old genius Jiang Hua built a mecha in her backyard using her inheritance, but an unusual energy signal led the nation’s highest-security agency to recruit her.
With the mysteriously bound “227 System,” she enters a mecha base deep in Lop Nur, where humanity’s completed interstellar fleet and a Mars outpost lie hidden.
Three years later, the decisive battle will unfold in Mars orbit. Jiang Hua and the mecha born in her backyard will become the most unexpected variable, and the greatest hope, in this battle for the survival of civilization.
