Salvation's Key

A moon-sized comet tears through the Solar System on a collision course with Earth, threatening to exterminate all life. From the devastating malfunction of an earth-orbiting telescope being used to discover a weakness in the comet, the world regains a glimmer of hope that a possible solution for survival has been found. Is there sufficient time for this maneuver to be implemented? Can astronomers Carrin Hamilton and Scott Franklin convince humanity it should even be attempted? Will a mysterious cult whose mission is to ensure the natural evolution of the universe be successful in sabotaging their plans? What hidden archeological habitats discovered by Carrin's son, Rex, become paramount in the desperate attempt to save humanity?