On a Mars colony in the year 2145, an officer in a rebel militia discovers that his sister, who was abducted a dozen years before, is still alive and has been raised as a soldier whose goal is to bring about the destruction of her brother s faction.

Ashin grows up in a small town at Yilan. He joins the school gymnastic team at an early age. In order to become a national player, he never gives in to hard trainings. However, Ashin gradually loses his way in rebel time. He gives up gymnastics and joins the gang with his best friend, Pickle....