After trying to help a friend with bad dreams, Crockett and Ruby are visited by a beautiful woman who was the victim of murder over fifty years ago. From an unknown grave, she sets them on a course to save her great grand daughter from repeating the mistakes of three generations. With the help of Cletus Marshal and the skill of a Vietnam era helicopter pilot, Crockett and Ruby attempt to rectify a past, save a future, and keep a Grave Promise.