Flora's been in love with her husband for twenty years. The trouble is, he's been married to someone else for the past fifteen. Now she's been invited to spend the summer in the shady lanes and sandy coves of Cornwall. It should be blissful. There's just one small snag: she'll be staying with her former mother-in-law, Belinda. And Flora discovers she's not the only one invited when her ex-husband shows up out of the blue, complete with his new wife. So now there are two small snags. Can Flora spend the summer playing happy families with the woman who stole her husband's heart, and the mother-in-law who might have had a hand in it? Or will stumbling on the family secret change her mind about them all?