"As the battle for Central City rages on, Alphonse faces off against Pride and Kimblee with the aid of a Philosopher's Stone. Can he come up with a plan to take down these two dangerous foes? Meanwhile, Ed and his friends run into Envy below the city. When Roy Mustang learns the truth about Hughes's murder, will he be consumed by hatred and do the unthinkable?" -- from publisher's web site.

As Greed and King Bradley continue their battle, the mysterious homunculus "father" makes his move under Central City. In order to achieve his objectives, he will need to force Mustang to make an unthinkable choice. Meanwhile, Alphonse has the chance to regain his own body, but the sacrifice to do so may be too much.