A wedding to plan. A wedding to stop. What could go wrong?

Cassie loves Henry. Henry loves Cassie. With a Tiffany ring on her finger, all that Cassie has left to do is plan the wedding. It should be so simple but when Henry pushes for a date, Cassie pulls back.

Henry's wild, young cousin, Gem, has no such hesitations and is racing to the aisle at a sprint, determined to marry in the Cornish church where her parents were wed. But the family is set against it, and Cassie resolves to stop the wedding from going ahead.

When Henry lands an expedition sailing the Pacific for the summer, Cassie decamps to Cornwall, hoping to find the peace of mind she needs to move forwards. But in the dunes and coves of the northern Cornish coast, she soon discovers the past isn't finished with her yet?