Eternia is a princess born to the royal family of Crystalia and Sapphire. She's the only surviving child of Queen Marcella and King Aurelius' marriage. Her life is in constant danger given that she's the only daughter and heir to the Sapphire Throne and the eldest of the Crystalian Empire. On her journey, she meets an ancient warlock named Adrian who's trapped in a child's body and forced to "grow up" again. They grow up together. Adrian is sworn to become her protector. Together, they fight off obstacles and solve mysteries as she readies herself to become Queen.