In deepest Cornwall, the mansion Kittiwake has seen many pass through its doors since it was bought by American heiress Peggy Carmichael seventy years ago.
Over the decades, the keys have been handed down through the family, and now it belongs to Bel's adoptive brother, Lance. It's where he'll be celebrating his 50th birthday, and Bel is invited.
But Bel barely feels like she's holding it together as it is, and in going back to Kittiwake, she will be returning to the place where it all began - where, following the death of a child, a sequence of events was set in motion, the consequences of which are still rippling down through the generations . . .