The plot line states that the Galaxy Federation comes to the discovery that the ORN Empire houses a machine known as "Plealos" deep below a planet's surface. As a result, the federation attempts to destroy this machine via a sneak attack from the next starfighter of the Fire LEO production series: Fire LEO-02 "Exceliza". Despite the strenuous obstacles the spacecraft encounters through its journey, it eventually tracks down and destroys Plealos, putting the Galaxy Federation one more step ahead against the ORN Empire's quest for total organic extermination in the universe. Since then, the starfighter is never used again in the series.