While conducting a liberation mission on Planet Sleeby of the Norma constellation, Stinger and Champ are attacked by Jark Matter and fall into a valley where they remember a common unforgettable past.

The story follows Stinger and Champ searching for Scorpio when they encounter a town whose inhabitants are being attacked by a mysterious woman. Stinger and Champ accept the task to deal with her, but Stinger realizes the words she uttered resembled her brothers', making him hold back, "I seek power… That alone."

The woman's name is Mika Rettsu. One of her arms is grotesque and consequently making the town's people persecute her, leaving her with a desire for revenge. Mika wishes to become a member of Jark Matter, reminding Stinger of his own brother even more, so he begins to want to save her from a sorrowful isolation.