Decky Does a Bronco is the tragi-comic story of a gang of nine-year-old boys who spend the summer of 1983 'Broncoing swings' in Girvan, on the west coast of Scotland. Broncoing (kicking the swing over the bar) is the social bench mark and a dangerous mixture of vandalism and sport.

Decky is the smallest of the group and the only one who cannot Bronco. His friend David remembers the event of that summer, which at first seem hilarious but ultimately remain painful, as the boys are faced with an unthinkable tragedy and are thrown into a restless adulthood.