"In March 1900, as former Congressman John Bingham of Ohio lies dying, he begins to tell a strange tale to his physician, Dr. Jamie Fraser. Bingham famously prosecuted eight members of John Wilkes Booth's plot to kill Lincoln. But during the 1865 trial, conspirator Mary Surratt divulged a secret so explosive it could shatter the republic. Though Bingham takes the secret to his grave, Fraser cannot let go of the mystery. Bored with small-town medical...