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.
When a solitary writer adopts and bonds with a Great Dane that belonged to a late friend, she begins to come to terms with her past and her own creative inner life.