In 2050 A.D., the Earth spaceship Tycho lands on the eighth moon of Saturn, nine hundred million miles from the sun. Hugh Benning, a mineraologist, and his men explore the deserted world. When they come to a natural cave, the men begin to stagger and fall. Benning disappears into the mouth of the cave.

The pilots gather up the limp forms of Benning's men and return them to Earth. The team isn't dead -- but isn't quite alive. Are they in a state of suspended animation? Can they be revived to shed light on this weird new menace from Saturn's moon?

A thrilling science fiction novel from the author of ADAM LINK--ROBOT!