Alma Torran was once a world ruled by a powerful magician, Solomon. He was a well loved and respected king, and three Magis supported him. At some point, after betrayal of one of his Magis, a war exploded where the Magicians and Goi fought each other. They were attacked by the Medium, its Black Djinn and Al-Thamen. In order to fight against them, Solomon's 72 Household Members became Djinn and attacked them one after another. In the end, a lot of the people of Alma Torran were left dead. Solomon created a new world, the actual world where the humans live, and the survivors of Alma Torran were settled there.
"Alma" is either a corruption of the Arabic word 3ālam عالَم, meaning "World", or the Arabic word أرُومة Arūma(t), meaning "Source/Origin/Root/Beginning/etc". Torran derives from the Arabic word طرّا Ṭurran, which means "altogether, in entirety, without exception". Thus, this place name roughly means either "(The) World in its entirety" or "(The) Source/Origin in its entirety".