Paris, 1928: Composer Maurice Ravel (Raphaël Personnaz) receives a commission from the eccentric dancer Ida Rubinstein (Jeanne Balibar) to compose music for her next ballet. She desires something sensual and captivating. At first, Ravel feels unable to put anything into writing. He seeks inspiration in his everyday life and delves deep within himself, confronting the failures of his early years, the disruption caused by the First World War, and his impossible love for his muse, Misia (Doria Tillier). A seemingly random idea becomes the basis for his greatest success, a fascinating and unique work that will propel the composer to worldwide fame: the Bolero.