The promised day approaches, and the action does not slacken in this new volume of Fullmetal Alchemist! Following the battle against the formidable Kimblee, Edward Elric disappears into the depths of the northern mines. His brother Alphonse, meanwhile, is having increasing difficulty maintaining the link that attaches his soul to the armor serving as his body. He joins Doctor Marcoh and helps him decipher Scar's research. Betrayed by whom he thought was his ally, Doctor Marcoh's close guard is attacked by Envy. A surprisingly conclusive battle against the terrible homunculus looms.