NASA lures volcanologist Erica Daniels to a conference in Houston by promising to consider her for their upcoming mission--establishing the first moon base. Instead, her archrival and ex-lover, David Marsh, gets the plum assignment, while she's sent to Antarctica to lead a new team beneath the ice. Even worse, she's sent in blind. They told her about the thermal signature, but not about the bodies. Where did they come from? They don't belong to the missing investigative team, so what had become of her fellow scientists? Is the activity under the ice the remnants of an ancient civilization or is there a more sinister explanation? The answer could mean the very survival of the human race. To find out, Erica will have to join forces with the man she despises--a man who's on the moon.