Diana von Flugel warned her husband: a piece of toast that hard could break a tooth. When Diana goes to Melbourne to have the tooth fixed, Wolfie is far too concerned with finding inspiration for his musical compositions to realise the chain of events he has just set in motion. On Collins Street, Russell Lockwood catches a glimpse of his childhood friend and knows at once that she is a rare woman. Now Diana and Wolfie's marriage is under threat, the Great War is approaching and no one quite knows where their hearts belong.