Ran, is a samurai from the Cliff Village Kingdom. The first two years when he served, his kingdom was overthrown by the rebels led by Garun. A criminal whose swordsmanship is very high. The government also resisted. But it turns out that the strength of Garun's troops is stronger. So the kingdom fell. Leaving sorrow for the residents of Cliff Village. Ran was devastated because when he fought Garun, he lost. Garun didn't kill Ran. For ten years Ran burned the fire of revenge. During that time he was retrained by Goto so that his swordsmanship would be higher. When Goto felt Ran was strong enough, he allowed Ran to look for Garun. Now, Ran is a ronin, a no-man's samurai with a vengeance.

In this galaxy, developed planets want to reach the highest peak and then get the title of strongest planet. Not a few of them are in an alliance to colonize a planet that is poorer but rich in resources. Major alliances fought for territory when they were involved in disputes. A group that calls themselves the Freedom Alliance is a group that contains all kinds of beings from various planets as well. They are an ideology in which every planet has the right to be free without interference from the invaders. This alliance helps a planet that is being colonized and is the enemy of major alliances. When a young man from planet Earth meets a member of the Freedom Alliance, he know his destiny to reconcile this galaxy.