The Elric brothers, Edward and Alphonse, face the consequences of violating the Law of Equivalent Exchange through a failed human transmutation experiment. Left crippled and soul-bound to a suit of armor, they embark on a quest for the Philosopher's Stone to restore their bodies. With the aid of military allies, they uncover a nationwide conspiracy and confront moral dilemmas that challenge their humanity. As they unravel the secrets of the Stone and their country's past, they are forced to question the true cost of their ambitions.