The Bydo were created by mankind in the 26th century to be used as weapons of ecological destruction against our enemies within the galaxy. Unlike conventional weapons of defense, the Bydo were conceived as limited range weapons with the purpose of destroying every ecological form in their path.

The Bydo were placed inside a container almost as large as the moon where they consumed everything and continued to evolve. A combination of physics, genetic engineering, and black magic resulted in man-made creatures of evil.

Mankind intended to send the Bydo through a wormhole to the enemy solar system to annihilate their planet. Everything appeared to be going as planned. However, there was a slight error and the Bydo became active in our own solar system. For 150 hours they raged until they were carried away to another dimension by a special weapon. It appeared that mankind in the 26th century was safe.

However, the Bydo were still alive and continued to evolve in another dimension. After wandering for what seemed like an eternity, they reappeared in the 22nd century to demonstrate their power against Earth.

In the distant future, human governments, across the planet Earth, construct a massive supercomputer, named "Con-Human". The purpose of this computer is to govern the planet's environmental systems, verifying proper nutrients and care is provided to ensure the culture of humans and animal alike.

However, disaster strikes when, after a cloned human's mind is linked with the system, Con-Human becomes sentient and insane. It begins to induce calamities across the planet, constructing corrupt clones of existing organisms, destroying its human masters and exterminating the nature it was intended to protect, apparently intending to replace everything with what Con-Human considers improved versions of themselves.

After prolonged war, Con-Human has succeeded in exterminating 99.8% of humankind, with the remnants fleeing to space colonies. Meanwhile, Con-Human remakes the very interior of Earth. As a result, Earth, as humanity knew it, has utterly ceased to exist, transformed into a planet-sized mobile fortress that is in fact Con-Human's body. Con-Human intends to use the transformed Earth to seek out and destroy the colonies, erasing all remaining traces of old life from the universe and leaving only the new life that it personally created. Now, taking the full-scale offensive, mankind develops powerful ships, one of them the RVA-818 X-LAY starfighter, to fight the oppressive machine by destroying the now-infected Earth entirely.