Sophie is dreaming. Or at least, that is what she must believe to survive the nightmare.
In a world ravaged by the "Century of Oxidation," humanity huddles in underground bunkers while horrific machine-beasts; the Rusters, rule the surface. Here, a single drop of Steel Rain can turn human bones to brittle iron.
After a devastating tragedy, Sophie is left for dead in the deepest scrap dungeons. But instead of rotting, she mutates. Her blood holds a miraculous secret: it can tame and rewrite the cores of the very monsters that devoured her home.
To Sophie, the terrifying beasts are just her "dream pets." When the world’s most powerful Sage, discovers this wild, monster-commanding child, he realizes she is the key to saving humanity. But in a world of corrupt elites and greedy factions, keeping his new apprentice alive might be his hardest mission yet.