Kidong is an exploration crew member of ASA (not NASA), aka Asia Space Administration. He leaves ASA to raise his daughter, Kyujin, after his wife and colleague, Sunho, dies during childbirth. One day, he has a mysterious experience meeting Sunho from a different dimension and decides to go back to space to search for her. He boards the secret spacecraft, Super Nova, based on the blueprints left behind by Sunho.