Hilary and Jacqueline du Pre, musical prodigies in England in the 1950s. While Hilary chooses to start a family, Jackie quickly rises to international fame and fortune, dazzling audiences with unbridled passion for her music, and marries renowned pianist Daniel. Although they're treated as musical royalty, the constant touring strains Jackie, who longs for the simpler life that Hilary built and more. Lonely and depressed, Jackie reveals the unthinkable: she longs for her sister's husband.