The union is doomed, its death foretold in the fever dreams of Mary Todd Lincoln . . .

As a great nation's destiny is being written in blood on the battlefields of Pea Ridge and Shiloh, a grim tomorrow is foreseen by a deeply troubled first lady and interpreted by her best friend, Mercy, herself an accomplished seer. But hope appears out of the mist with the arrival of Thomas, a mysterious stranger with an astonishing mastery over time and space. Against the backdrop of the Civil War's greatest events, these three must join together to salvage a future with the aid of unlikely collaborators: the uncannily gifted Confederate captain Cole Younger, his notorious career as a bank robber as yet undetermined, and President Lincoln himself, called upon to willingly make the ultimate sacrifice.

And the key to their desperate endeavor lies in a mysterious image from Mrs. Lincoln's tortured visions—a magical sword which, when wielded, will bring redemption . . . or destruction.