In the year 2269, Earth is overrun with enormous, cybernetic monsters known as Hyper Insects. Their primary base is an underground mobile fort known only as the mothership. In order to combat the Hyper Insects, the defense forces create an insect bio-jet in similar form to the enemy called the Chimera which transforms the pilot into a humanoid insect upon use. This happens to the protagonist 'Rad Ralph', who has been assigned to attack the Hyper Insects and reclaim Earth.