An ancient organization more powerful than the federal government has targeted the USA. They'll stop at nothing to destroy the republic and raise an empire. The adventure begins with a mysterious military burial - and a shocking legacy that has explosive implications for America's future. Archaeologist Conrad Yeats discovers in his father's tombstone the key to a centuries-old warning built into the very design of Washington DC. Major monuments along the National Mall are astronomically aligned and are about to 'lock' with the stars at a date foreseen by the Founding Fathers. Along with Serena Serghetti, a beautiful Vatican linguist with secrets of her own, Yeats explores the hidden world beneath America's capital city in a deadly race to save it. For America has a date with destiny - and the fate of the world hangs in the balance.