Is it wrong to make our own choices? To go against destiny? To protect what is precious to us? And to fulfill a promise? In a dream, Scarlet heard a voice telling her to find the person with the blood-color eye who will help her to save the Crimson world from the Gray Lord, and to fulfill her destiny as the Crimson princess. After awakening her powers as the Crimson princess, her appearance changed. Now, she has a blue and purple eye, and red hair. In order to find the person with the blood-color eye, her friends Ric and Nagi agree to help her. On their journey to find the person, Scarlet discovers a secret about her family.