The storyline follows a young boy named Hiroshi Umino (海野広) who sneaks aboard a freighter in order to leave Earth. As the freighter is flying through space they are attacked by an Afressian ship bearing the Skull and Crossbones insignia. However, the train is saved by a mysterious and incredibly powerful spaceship (which also bears the insignia) and is able to make it to their destination, a desert planet with a Western atmosphere, complete with saloons and bar fights. The boy meets up with another stowaway, an old man, and becomes friends with him. He tells the old man that he came to the planet in order to become a stronger individual. He gets himself a job in a bar with the roughest reputation on the planet to prove himself.
