In a monster-infested wasteland, Piper lives as an abused orphan under her aunt's cruel thumb, concealing an apocalyptic entity sealed within her blood. When she secretly saves an elite scout captain during a midnight raid, a keen-eyed commander recognizes her supernatural caliber and reveals her parents were assassinated by internal traitors.
Enlisting in the vanguard to hunt her family's murderers, Piper slays colossal beasts and ascends the deadly Medea Tower. When high-ranking conspirators ambush her squad, she tears off her restraints to wage relentless war against the corrupt syndicate controlling the human coalition.
