On campus, a student, Charlie, finds himself with a cold. His friend is nearly ran down by a truck but is rescued by an invisible stranger. The alien is invisible on this planet, but has amazing powers to predict potential dangers. Is this where premonitions of danger come from?
Warnings prove correct, and the alien is allowed to be a constant companion and protector. What’s in it for the stranger? All any Dirg wants out of life is the satisfaction of helping.
All goes well for a while, and life is normal enough, other than an occasional report of hazards. Reports grow, and expand to ever widening locations. Genuine enough, but often irrelevant. Then comes the worst news… a Gamper is after our hero. But will he give the Dirg the brush off?
If he does, is there any defense against the Gamper, or other nasty invisible critters who zero in on our hero? Is there anything to avoid to keep the invisible critters from being set off and enraged?