They make their music with hammers, chisels, spanners and other tools. And this percussion band performs not during breaks from their toil, but as part of their work , melding their music with their labour. With 44 rivers, Kerala has long had a lot of boat traffic on its waterways. But due to the advent of extensive road networks and mostly machine-made, prefabricated vessels, the labour force in the boat-making industry has declined sharply. What remains is a fast-shrinking group of highly-skilled boat repairmen who still keep many ageing, almost antique craft afloat with their unrivalled expertise. In this film, they tell us their story.