the young elike brothers missed their dead mother very much, and did not hesitate to violate the biggest taboo in alchemy and practiced human body. but the refining failed. the elder brother edward lost his left leg and right arm, and the younger brother alphons lost his body and could only possess his soul in a pair of armor. in order to repay their own sins and retrieve everything they lost, the two brothers embark on a journey to find the legendary "stone of the sage". a few years later, a national alchemist whose right arm and left leg were replaced by "mechanical armor" appeared in front of people. he was called the "alchemist of steel" ddd