Iris Du Pré (Celia Imrie) inspires a love of music -- and a healthy rivalry -- in her daughters, Hilary (Rachel Griffiths) and Jackie (Emily Watson). Cellist Jackie outshines her flutist sister when her skillful playing lands her in the international spotlight. Meanwhile, Hilary builds a quiet but happy family life. When Jackie buckles under mounting pressures in the high-stress world of elite classical musicians, she turns to Hilary for help, and may put her sister's love to the test.