Nearing the end of his project in the Hertfordshire housing estate of South Oxhey, choirmaster Gareth Malone sets out on a grand venture to get the whole community behind his choral project. He decides he wants to stage a free choral festival at South Oxhey playing fields, a large green space normally used for football and dog-walking, and embarks on putting together the largest event this area has seen for half a century.
With the help of local residents, the new South Oxhey Festival takes shape. Gareth draws together every strand of his singing project to form a grand choir of unprecedented size, which will sing together at the festival for the first time. Will South Oxhey's residents take their community choir to their hearts?