Wyman Ford is tapped for a secret expedition to Cambodia... to locate the source of strangely beautiful gemstones that do not appear to be of this world.

A brilliant meteor lights up the Maine coast... and two young women borrow a boat and set out for a distant island to find the impact crater.

A scientist at the National Propulsion Facility discovers an inexplicable source of gamma rays in the outer Solar System.� He is found decapitated, the data missing.

High resolution NASA images reveal an unnatural feature hidden in the depths of a crater on Mars... and it appears to have been activated.

Sixty hours and counting.