New York in the Roaring Twenties - a time for love, secrets and scandal… As the freedom of the Jazz Age transforms New York City, the iridescent Mrs Theresa Marshall of Fifth Avenue - a beautiful socialite of a certain age - has done the unthinkable: she's fallen in love with her young lover, Captain Octavian Rofrano, a handsome aviator and hero of the Great War. But though times are changing, divorce for a woman of Theresa's wealth and social standing is out of the question. When Theresa's bachelor brother, Ox, decides to tie the knot with the youngest daughter of a newly wealthy inventor, Theresa enlists her lover to present the family's diamond rose ring to pretty ingénue, Miss Sophie Fortescue - and to check into the background of this little-known family. Yet even as he uncovers a shocking secret, Octavian falls under Sophie's spell… Divided loyalties and dangerous revelations lead to a shocking transgression and eventually Theresa must make a choice that will change them all forever.