The unlikely tale of how two Welsh farming brothers turned their dairy farm into one of the most successful recording studios of all time, producing four decades of legendary rock music. From Black Sabbath, Hawkwind and Queen, to Simple Minds, Iggy Pop and Robert Plant, and later Oasis, The Stone Roses, The Charlatans, Manic Street Preachers and Coldplay - an unbelievable roll call of artists have recorded there over the decades. In this documentary the bands share with us tales of how they ended up at Rockfield, what it was like, and revisit some of the magical moments of musical genius that resulted in some of the best-known songs of our time.