One of the world’s most popular pieces of classical music, Maurice Ravel’s Boléro (1928), was no longer copyrighted as of May 1, 2016. Up to then it had made Ravel and his heirs millions. Ravel died in 1937 and left all he owned to his brother Edouard. Edouard’s death in 1960 unleashed a complex legal battle over the rights, involving among others Edouard’s nurse and her husband. This 2017 documentary gives a fascinating account of what happened to one this iconic piece of music right under the nose of the public. Filmmaker Fabien Caux-Lahalle underpins this investigative story with clips of the Boléro in various guises.