As Aileen, Maureen and Oonagh – the three privileged Guinness sisters, darlings of 1930s society – settle into becoming wives and mothers, they quickly discover that their gilded upbringing has not prepared them for the realities of married life.
At Dublin’s Luttrellstown Castle, practical Aileen has already run out of things to say to her husband. Outspoken Maureen is very much in love but feels isolated at the crumbling Clandeboye estate in Northern Ireland.
And, as romantic Oonagh’s dreams of happiness in London are crushed by her husband’s lies, she seeks comfort in her friends – but can they be trusted?
As the sisters deal with desire and betrayal amidst vicious society gossip, their close friends, the Mitfords find themselves under the media glare – and the Guinness women are forced to examine their place in this quickly-changing world.