To protect her son Leon, whose bloodline was unstable, the Red Dragon Queen Isola sealed away nine-tenths of her dragon power and disappeared into the mortal realm. After suffering countless humiliations at the hands of the noblewoman Arianna, she was forced to return to the dragon race, only to be embroiled in power struggles and a bloodline crisis. Ultimately, Leon overcame his fear and harnessed the dragon blood, inheriting the throne a hundred years later, with the deep bond between mother and son remaining throughout.