Under the surface of the desert lives a race of aliens who fear light. Light, it seems, burns the skin of these dark creatures. Seems the space travelers picked the wrong time to vacation there. Every 22 years the large Saturn like planet eclipses the suns and darkness falls over the planet. In a matter of hours they must get the one remaining life support ship operational and get out of there.
Darkness falls, and the creatures take to the air.
The movie is ok. There are a few coincidences that seem a pretty big stretch. I must say the effects are pretty well done. The way they show the lighting coming from the three suns depending on which one is highest in the sky is quite eerie, and sets a good scene. The blue sun lights blue light, the red sun with red, etc.