As the siege on Grand Central progresses, the defence strikes back with a vengeance, pitting our heroes against their most challenging opponents yet. General Olivia - now revealed as an insider - calls truce to her rivalry with her brother Major Alex as they face the onslaught of the Homonculus Sloth. Meanwhile, Colonel Mustang settles an old score with Envy, the Homonculus who killed his best friend Hughes. Even Alphonse and Hienkel, far from the battlefield, find themselves fighting for their lives as an ambush from the Crimson Alchemist has set free the Homonculus Pride, and their one slim chance of survival lies on a stray Philosopher's Stone...