Her children had always thought Jamie Nash was hiding something. It didn't make sense for a claims clerk's widow to live in a large house, paid for in cash, or to give away thousands upon thousands of dollars in cash donations to charities. Where did the money come from? Upon her death, Jamie Nash leaves a mysterious letter behind for her grandson, Greg O'Callahan. While the rest of the family is consumed with jealousy and greed, O'Callahan vows to follow his grandmother's wishes to keep family secrets and fulfill ancient legacies. In the small-town of Pulaski, Tennessee, O'Callahan discovers legends of Civil War gold, forgotten family members, friendship, danger, greed and home. O'Callahan struggles through a world of midnight treasure hunts and heated court battles turned violent in an attempt to live up to the title his grandmother bequeathed him: The Last Knight.