While Jim and Artemis are investigating a rash of counterfeiting, they uncover a genuine plot to begin a new civil war where the old one ended. It's deja vu all over again when a group of Texas secessionists plans to assassinate President Garfield as he attends the theater in Houston. And the star attraction of the theater troupe's treasonous repeat performance will the part of the killer--played by history's most notorious actor-assassin himself...John Wilkes Booth!