London, 1914. Sick and injured servicemen are returning home and Lizzie Kellaway and her godmother Margaret Penrose are determined to do their bit to help them. With Lizzie's beautiful singing voice and Margaret's talent for the piano, concerts in hospitals and convalescent homes offer the perfect opportunity to lift the spirits of men who have suffered so much. When Polly Meadows's fiancé rejects her and leaves for the war, she doesn't hesitate before travelling to London to be with her childhood friend, Lizzie. It isn't long before she's persuaded to join their efforts to entertain the troops. With all three women facing struggles, one thing is certain: these wartime singers will need each other more than ever before . . .