One Sunday morning four women at a bridge party in the elegant Gramercy Park Hotel see a beautiful young woman whom they all know leaving a nearby hotel with a man who is not her husband. The sight of twenty-year-old Lizzie Carswell with Billy Holmes is shocking and potentially ruinous. And though the ladies do not know the whole story -- and despite their mutual promise to keep what they've seen to themselves -- it is only a matter of time before one of them talks . . . with heartbreaking consequences for them all.In One Sunday Morning, author Amy Ephron brilliantly navigates the social contradictions of Jazz Age New York society and brings a remarkable time and place to glorious life with a riveting drama of gossip, indiscretion, secrets, and betrayal.