The 520 Cens Promise
Ed passes on what Riza told him to Al, and the two contemplate about what to do after they complete their objectives, and as to why Scar and May's alchemy worked when their's was blocked. However, May had run off, so they go and look for her. Meanwhile, Riza, Breda, Fuery and Halman say their goodbyes as they are sent to different HQs, with Roy finding a hidden message inside a chess set Halman gave him. Roy later reminds Ed that he owes him 520 cenz, but Ed decides to keep ahold of it until he becomes Fuhrer. Roy uses the note he got from Falman to make contact with Grumman. Meanwhile, Fu is shocked to find Lan Fan had lost her arm, and declines Ed's help to find an automail mechanic, since it would involve his acquaintances in their troubles. Afterwards, Knox gets a visit from his children, who are pleased to hear he's been able to successfully treat patients. Realising that Marcoh had escaped along with Scar, Envy releases Kimbley from prison, giving him to the task to retrieve Marcoh and kill Scar. Wanting to find out more about Kimbley and the secrets behind his brother's alchemy, Scar destroys Marcoh's face so it won't be recognised, before heading off to the North to recover his brother's notes.
Aired 08/11/2009EP 31 - The 520 Cens Promise
Fullmetal Alchemist: Brotherhood
"In order for something to be obtained, something of equal value must be lost."
Alchemy is bound by this Law of Equivalent Exchange—something the young brothers Edward and Alphonse Elric only realize after attempting human transmutation: the one forbidden act of alchemy. They pay a terrible price for their transgression—Edward loses his left leg, Alphonse his physical body. It is only by the desperate sacrifice of Edward's right arm that he is able to affix Alphonse's soul to a suit of armor. Devastated and alone, it is the hope that they would both eventually return to their original bodies that gives Edward the inspiration to obtain metal limbs called "automail" and become a state alchemist, the Fullmetal Alchemist.
Three years of searching later, the brothers seek the Philosopher's Stone, a mythical relic that allows an alchemist to overcome the Law of Equivalent Exchange. Even with military allies Colonel Roy Mustang, Lieutenant Riza Hawkeye, and Lieutenant Colonel Maes Hughes on their side, the brothers find themselves caught up in a nationwide conspiracy that leads them not only to the true nature of the elusive Philosopher's Stone, but their country's murky history as well. In between finding a serial killer and racing against time, Edward and Alphonse must ask themselves if what they are doing will make them human again... or take away their humanity.
(Source: MAL Rewrite)