Future. Earth became the capital of the Empire. Order in the state is maintained by strict delimitation into Leagues. The ruling caste are aliens from space who have settled on the planet. Life in the Empire proceeds according to the laws and instructions of the "Great League." But what happens if one day the Ruler's son falls in love with the girl Sofia Sim from the lower faction and makes her equal to himself? How will the life of a young beauty change in a competition between the Rulers for her heart?