In The year of 2016, people have been infected by a virus called the X virus that causes human to have power like abilities but the city becomes ruined after people rebel against each other. 400 years later, In the year of 2416 (25th Century); 4 people who want to achieve their goal. Reiko Nakamura, a young princess from Level SS, Lu Wong, A happy-go-lucky from Level A, Masato Sendo, a quiet young man from Level S and Emiko Aoki and her automate cat, Yume From Level B head to Star City to becomes the most powerful hunter. Join them on their journey.