Usagi was born in the year of the Rabbit with the extraordinary gift of jumping above the clouds. She was seven, and her younger sister Uma was only three, when her father gave her a magic comb and told her that it contained the magic of the Jade Mountain. But a lot has changed since then, what kind of magic can it be when the cruel Dragon King captured their hometown, and talented children are forced to hide or become prisoners of his castle. And then one day Uma also falls into a trap! Usagi promises that he will definitely return for his sister. But who will help her? In a city where everyone is afraid to cross the path of the Dragon King! And where is the magical Jade Mountain that her father told her about? Does it really exist?