Meeting a man on the Internet, Julia decides to see him in person, only to get abducted and branded with the letter "x" by that guy. A game of cat and mouse follows, but the story has an unexpected twist.
Benjamin Franklin Gates and Abigail Chase re-team with Riley Poole and, now armed with a stack of long-lost pages from John Wilkes Booth's diary, Ben must follow a clue left there to prove his ancestor's innocence in the assassination of Abraham Lincoln.