The Capitol Building, Washington DC: Harvard symbologist Robert Langdon believes he is here to give a lecture. He is wrong. Within minutes of his arrival, a shocking object is discovered. It is a gruesome invitation into an ancient world of hidden wisdom. When Langdons mentor, Peter Solomon prominent mason and philanthropist is kidnapped, Langdon realizes that his only hope of saving his friends life is to accept this mysterious summons. It is to take him on a breathless chase through Washingtons dark history. All that was familiar is changed into a shadowy, mythical world in which Masonic secrets and never-before-seen revelations seem to be leading him to a single impossible and inconceivable truth…