The story takes place in 2501, when a laser weapon at a defense outpost on Pluto has malfunctioned and begun destroying the Solar System. The player takes on the role of the M-308 Gunner, which storms into the defense base in order to activate the self-destruct system before the laser gun destroys Earth.
In 2501, when a laser weapon at a Pluto defense station malfunctions and threatens to destroy the Solar System, the player controls the M-308 Gunner. The goal is for them to enter the defense base and activate the self-destruct system before the laser gun causes Earth's destruction.