A detective in a small Pennsylvania town investigates a local murder while trying to keep her life from falling apart.

When a congressional aide is killed, a Washington, D.C. journalist starts investigating the case involving the Representative, his old college friend.

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.