Big trains, small bands and unbridled passion.

In 2007 an indiepop music festival was born in the unlikeliest of settings - a heritage steam train site, Butterley Derbyshire. Bringing together passionate characters from two very distinct worlds this affectionate portrait is told from the point of view of the retired volunteers that run the locos who have "steam in their blood" and don't really know very much about "this indiepop music".