In deep space, a battle rages between the forces of good and evil, with the fate of Earth hanging in the balance. The evil Neos Gold dispatches her invading forces toward Earth with a single aim: the total destruction of all mankind. Now it falls to Iczer 3 (the younger sister of Iczer 1) to defend Earth from Neos Gold's deadly armada, aided only by the planet's single remaining battle cruiser. But do not count her out; what Iczer 3 lacks in experience, she makes up for with all-out enthusiasm.