As the hedonistic Jazz Age transforms New York City, glittering socialite Mrs. Theresa Marshall has done the unthinkable: she's fallen in love with her young paramour and war hero, Captain Octavian Rofrano. Though Octavian wants to marry Theresa, she resists. The world is changing but divorce for a woman of Theresa's wealth and social standing remains risky. And there is no need: she shares a gentle understanding with her husband, Sylvo. That is, until Theresa's brother, Ox, decides to marry Miss Sophie Fortescue, a wealthy inventor's daughter. Theresa enlists Octavian to check into the background of the reclusive Fortescue family. When Octavian meets charming Sophie, he falls for her, even as he uncovers a devastating family secret. As a fateful love triangle forms, loyalties divide, drawing Octavian into transgression . . . and Theresa into making a bittersweet choice. Full of glamour, wit, and delicious twists, A Certain Age is a beguiling reinterpretation of Richard Strauss's comic opera Der Rosenkavalier set against Gatsby's decadent New York.