In Isaac City, two corporations wage a vicious war for control of the population—a conflict that plays out in the streets and costs civilian lives. In one of the worst confrontations, a young man loses his entire family. Months later, with grief hardened into purpose, he seeks out the Armored Core pilot responsible for the chaos that day—a pilot known only as Hustler One. To find him, the young man enlists with the Ravens' Nest mercenary registry. Another Raven enters the fold, with a score to settle.