Ben Conklin has been a loner ever since his parents died when he was twelve years old. This is one reason why General James Eiger selected him to spend a year buried in a bunker 11,000 feet below the Artic tundra, manning the controls of a doomsday device set up by world leaders after the Hubble space telescope spotted 11 spaceships heading towards Earth. The device is designed as a last-line deterrent against alien invasion and Conklin's job, shared with four other loners in four other bunkers, is to hit a dead man's switch on the bunkers control panel that prevents the doomsday device from going off and destroying aliens and mankind alike. At first, the job is easy, but as the aliens draw closer to Earth, and as Conklin grows closer to his subterranean colleagues, he begins to doubt the reliability of the doomsday machine. News from General Eiger becomes scarce, then Conklin's fellow guardians begin to fall victim to assorted mishaps. Conklin realizes that he carries the weight of
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