The world is divided into three regions: the Sky Islands, the Surface, and the underground world known as ‘Proserpina.’ Miovere, who lives in Proserpina, dreams only of the day she can go to the Sky Islands with her first love, Haluk. However, one night while Miovere is asleep, a revolution breaks out in the underground world, changing the fate of both Haluk and Miovere…!