A political thriller from first-novelist Gilroy--the familiar story of a government employee finding out one secret too many and becoming the target of a government cover-up. Matthew Clarke, demoted from his job as a satellite controller for the top-secret National Security Agency to a desk in Imagery Analysis, notices a disturbance in an aerial photograph taken off the California coast and decides to investigate it on a routine dive with his friend Dave Lakeman, whose wife Perri he's having an affair with. Diving into the spot, Matt and Dave discover a Russian submarine with eight long-dead Americans aboard. Matt reports his find to his superiors at NSA, and they promptly go after him his boss because he thinks Matt is a plant designed to test security in Imagery Analysis, and his boss, Leonard Vanning, because he wants to conceal the fact that an American nuclear test in 1954 destroyed the phony sub that had been used at the height of the Cold War to scare Congress out of more defense money. From that point on, everything goes predictably but entertainingly, as Matt survives repeated attacks on his life (though Dave doesn't), the theft of his evidence, and isolation from his family and friends--including Perri, who gets dropped from the story the moment she's outlived her usefulness--until he can join forces with the crusading Senator lawrence Rosenbaum and his comely aide, Leslie Flood, to defeat the laughably evil Senator Claude Screws, the power behind the cover-up. Despite a blank-page hero, cartoon villains, telegraphic background and atmosphere, and mediocre writing, this is good no-frills storytelling: a gripping, eminently forgettable yarn.