A catastrophic reactor failure in 2031 transforms Earth into a hostile wasteland. The explosion unleashes quantum energy across the planet, warping the environment and spawning biomechanical horrors called B.R.A.I. that threaten humanity's survival. Seven years later, Leon Lau, a scientist haunted by his role in the disaster, lives as a scavenger on the outskirts of Neo Shouryou, one of the last functioning human settlements. When Leon forms a contract with Chloe, a young girl with mysterious ties to the catastrophe itself, their partnership becomes the key to understanding what the B.R.A.I. really are. Armed with experimental mechanized weapons, they venture into the ruins of civilization to uncover truths about the reactor, the creatures hunting them, and whether humanity has any future left at all. The show balances intimate character moments with intense mecha combat, grounding its sci-fi premise in genuine human desperation. It's for viewers who want mechs paired with real stakes, mystery, and a world that feels genuinely broken rather than just scenery.