In a fantasy world, a small mischievous lunar faun named Mune is appointed guardian of the Moon, and no one is more surprised than he is. Now he is the one in charge of controlling the night and watching over the dream world. But everything he does ends up in a disaster, so much so that it gives the guardian of Darkness the opportunity to steal the Sun. With the help of Sohone, the proud guardian of the Sun, and the fragile Cire, Mune sets out on a quest that will make him a guardian of legend.