In 1868, Pinkerton Detective Nicholas Cosgrove is tasked with tracking down John Wilkes Booth, a man who should be three years in his grave. Booth, President Lincoln’s assassin, was also a skilled actor and master of disguise, and Secretary of War Edwin Stanton suspects he may still be at large. But Cosgrove unearths more than just the corpse of a man who is decidedly not Booth. The conspiracy to assassinate Lincoln was much larger, and far more dangerous than anyone suspects.