Long ago, there was a country known as Cselkcess. It was one of the first slave-trading countries, and had a lot of inhabitants. One of which was a slave named Slave 23. He wasn't that smart since the people that owned slaves never taught them. And he wasn't content at all. Then one day some alchemists that worked for the king of Cselkcess took a blood sample from him and that blood sample somehow gained a consciousness. That blood sample was a Homunculus, and gave the name of von Hohenheim to Slave 23. He tricked the king into trying to be immortal while Hohenheim and he were the ones who became immortal! Now called Father, the Homunculus started building Amestris over Cselkcess in order to gain another Philosopher's Stone. Whether he will succeed remains to be seen.