Elizabeth Arden and Helena Rubinstein each founded empires built on grit and determination. Yet they became locked in a feud spanning three continents, two world wars and the Great Depression. Brought up in poverty, Canadian-born Elizabeth Arden changed popular opinion, persuading women from all walks of life to buy skincare products that promised them youth and beauty. Helena Rubinstein left her native Poland, and launched her company with scientific claims about her miracle creams made with anti-aging herbs. And when it came to business, nothing was off-limits: poaching each other’s employees, copying each other’s products, planting spies, hiring ex-husbands, and one-upping each other every chance they had.

New York City, 1921: The war is over, fashions are daring and bootleg liquor is abundant. Here four extraordinary women form a bridge group that grows into a firm friendship. Dorothy Parker: renowned wit, member of the Algonquin Round Table, and more fragile than she seems. Jane Grant: first female reporter for the New York Times, and determined to launch a new magazine she calls The New Yorker. Winifred Lenihan: beautiful and talented Broadway actress, a casting-couch target. And Peggy Leach: magazine assistant by day, brilliant novelist by night. Their romances flourish and falter, while their goals sometimes seem impossible to reach. But their biggest challenge is keeping their dear friend Dottie safe from herself.

Jackie Kennedy was contemplating leaving her ambitious young senator husband. Life in the public eye with an overly ambitious --- and unfaithful --- man was breaking her spirit. So when she's offered a holiday on the luxurious yacht owned by billionaire Ari Onassis, she says yes. Maria Callas is at the height of her operatic career and widely considered to be the finest soprano in the world. And then she's introduced to Aristotle Onassis, the world’s richest man. Stuck in a childless, sexless marriage, she finds her life being turned upside down by this hyper-intelligent and impeccably charming man. Little by little, Maria’s and Jackie’s lives begin to overlap, and they come closer and closer until everything they know about the world changes on a dime.