1927: When Fred Lawson takes a summer job on St Kilda, little does he realise that he has joined the last community to ever live on that beautiful, isolated island. Only three years later, St Kilda will be evacuated, the islanders near-dead from starvation. But for Fred, that summer - and the island woman, Chrissie, whom he falls in love with - becomes the very thing that sustains him in the years ahead. 1940: Fred has been captured behind enemy lines...

Eighteen year old Effie Gillies has lived all her life on St Kilda; she's the best climber on the island, as skilled and brave as any of the men. But in matters of the heart, she's an innocent, and when Lord Sholto, heir to the Earl of Dumfries, visits, the attraction between them is instant. For one glorious week she guides the handsome young visitor around the isle, falling in love for the first time - until a storm hits and her world falls apart....

It's the summer of 1929 and Mhairi MacKinnon is in need of a husband. As the eldest girl among nine children, her father has made it clear he can't support her past the coming winter. On the small, Scottish island of St Kilda, her options are limited. But the MacKinnons' neighbour, Donald, has a business acquaintance on distant Harris also in need of a spouse. A plan is hatched for Donald to chaperone Mhairi and make the introduction on his final...