The next wave of American folk music is out in full force in this exuberant road movie-slashconcert film from veteran music doc director Emmett Malloy. This free-wheeling musical adventure follows indie folk bands Edward Sharpe and the Magnetic Zeros, Old Crow Medicine Show and Mumford & Sons on their cross-country Railroad Revival Tour as they traverse six cities from Oakland, California to New Orleans on a vintage train. The picturesque landscape across the American Southwest and the rhythmic clack of the train wheels provide the perfect backdrop for the bands to jam together and swap stories en route to jubilant, jam-packed concerts.