It has been two years since museum professor, John Morton, was recruited into a secret government agency and fell in love with a beautiful special agent / assassin while attempting to stop two renegade scientists determined to destroy the post-Civil War Union. But now just as he and Julia begin to build a wedded life together, her former boss reappears and shatters their peaceful existence with another assignment.

After they are appointed to confront a new danger threatening to instigate a new Indian war, John, Julia, and their former team that includes Father Peter Harrigan and a...