Dead Zones of the Fallen City

The night the sky split open, the city didn’t get invaded—it got indexed. Every street, apartment, and subway tunnel was stamped with numbers no one understood, then the System arrived and turned survival into a public scoreboard. Monsters poured out of the dark, and the only places left untouched were the fragile Safe Zones that appeared like wounds in concrete—temporary, shrinking, and always hungry for something in return.

Mara Venn was a paramedic who knew how to keep people breathing when the world was already dead. When the first wave hit, she awakened a brutal, unlikely class: Threshold Warden, a survivor built to map danger, reinforce borders, and expose hidden routes through the nightmare. But the Safe Zones are not sanctuaries—they’re traps, and every faction fighting to control them is willing to sacrifice strangers to hold power. As Mara uncovers the System’s buried logic, she realizes the dead zones aren’t random. They’re growing around something ancient beneath the city, and if she can’t learn what the System is really protecting, humanity’s last refuge will become its tomb.