It is a period of civil war. M.H. spaceships, striking from a hidden base, have won their first victory against the evil Team Plasma.

During the battle, Resistance spies managed to steal secret plans to Team Plasma's ultimate weapon, the Death Egg, an armored space station with enough power to destroy an entire planet.

Pursued by Team Plasma's sinister agents, Princess Sagiri races home aboard her starship, custodian of the stolen plans that can save her people and restore freedom to the multiverse...