AD 1999
A nuclear cataclysm has blasted the Moon and its Alpha base out of Earth's orbit, plunging it into the black gulf of deep space. With no hope of return, the Alphans were forced to wander through the star map in search of an hospitable planet.

They found Piri, a peaceful, lush world, a near paradise. Or was it?

To Commander John Koenig, Piri spelt danger — it was a mysterious planet of grey ash and blackened rock that had bewitched his crew. Hopelessly outnumbered, the base was evacuated to Piri and there Koenig discovered just what had taken control of their minds.

A RUNAWAY MOON IS THEIR SPACESHIP, THEIR REFUGE, THEIR PRISON!

Blasting through the cosmos on a collision course with adventure, the 311 inhabitants of Alpha travel to mysterious, uncharted regions of the galaxy. Each day is a game of survival with the merciless universe.

On Alpha, Commander Koenig is still breathing. His soul has been stolen by a dazzling woman in a purple city that exists in the realm of thought only. And blood runs cold when an alien force transforms a crewman into an icy, energy-consuming monster...who won't stop till Alpha freezes over!