2342 Branch Era Humankind has branched into space. Two opposing factions have emerged. On one side, Selene, in control of the Moon and what remains of Earth. On the other, Radon, in control of the space colony Cage. Cage is now under the control of the military group Radon Daughters. Led by Mother Roentgen, the Radon Daughters have ordered Genome Control to create a new breed of weapon. A weapon to end Earth's reign and birth a new universe. The World-Egg. Now, Cage is positioned above the Earth, ready to launch their final attack. Deep inside the Cage, a pilot awakens in the cockpit of the Halcyon - an experimental Radon gunship. Inside the newly-hatched Pilot's mind, a Voice echoes: "Destroy the World-Egg."