Ben Gates (Nicolas Cage) sets out to find the lost 18 pages from the diary of Abraham Lincoln's assassin, John Wilkes Booth. One of the 18 missing pages has been discovered by Jeb Wilkinson (Ed Harris) which contains the names of the assassination conspirators. After discovering his grandfathers name is on the missing page, Ben sets out to clear his family's name on an adventure that leads to the President's "Book Of Secrets" and a secret the world isnt ready to believe.