Feeling useless and invisible now that they are no longer gainfully employed, five retired white men move onto a refurbished tug to live out their days with a black captain, Alonzo Armstrong, and a Native American medicine man at the bequest of a mutual friend, all expenses paid. Named for Civil War units of men too old to fight who instead protected the home front, the Silver Gray takes them to places they always wanted to go. You'll laugh as they drool over women in string bikinis in Biloxi, visit a brothel in New Orleans, play practical jokes on each other at a gay bar, and mount a cannon on the Silver Gray's bow. But the men soon realize that they share a dark history that none of them knew. Who murdered Alonzo's father and stole his ancestral land in the 1950s? What does that have to do with the killing of Amos' wife and unborn child by two black assailants in the 1980s? Can they put their differences aside in time to save the country from terrorists set on nuclear destruction of the Gulf Coast? As young Attorney Martin Shearer helps them unravel the truth, the men begin to understand that hatred divides and forgiveness unifies.