Scandalizing historians with its blithe disregard for the historical record, this American Civil War docudrama poses the theory that President Lincoln's Secretary of War, Edward Stanton, was behind a plot to kill him at Ford's Theater. His motive was his opposition to Lincoln's adamant refusal to allow the North to punish the South for its actions. The "official" assassination goes awry when another would-be assassin, the second-rate actor John Wilkes Booth, learns of the plot and decides to beat the government to the punch, for reasons of his own. In the movie, it is Stanton's assassin who is mistakenly captured and killed, rather than Booth.