A bomb detonates inside Capitol Hill during the president's State of the Union speech, bringing America to its knees.Left behind to lead the country under the presidential 'Succession of Power' laws is an inexperienced junior cabinet member, aided by the only Secret Service agent who foresaw the horrific act.Together, they must calm a shaken nation and bring the terrorists to justice before they strike again, while fighting even more sinister forces at the very heart of government.