Far, far away, in the other side of time and space. In the universe, there is a group of people who call themselves "Golden Clan". They created star clusters and have the ability to predict the future. They called out to other races that have not yet matured: "Set off! From your home planet, go to the universe..." Three races responded to their call. The Golden Clan called them: Silver Clan, Bronze Clan, and Hero Clan. When the Golden Clan decided to leave this universe and go to another universe, a new responder appeared - the fourth race that broke out of the universe by its own power - humans. The Golden Clan called them "Black Iron Clan".