A top secret government project has been hijacked by selfish interests and four people have caught a glimpse of it. A famous but stalled writer and his equally famous wife, a painter, see something they can't believe as they travel along the boundary of an isolated federal research site in the high desert of Idaho. A world-weary ex-Marine and his summer hire cowhand see the same thing and both parties speed across the prairie to converge on a one-man roadhouse. There, two others have stopped for an afternoon break and soon all six, plus the cafe owner, find themselves held hostage by a group of heavily armed and uniformed men. When one man is killed, the war-wise Marine knows a bad ending for the rest is imminent. Using skills he thought he'd never need again, he manages to get the party out of the café and into the mountains where he’s in his element. It’s then a race for refuge with armed men in close pursuit below them and the strange phenomena they'd seen in the desert threatening them from above.
