Today, Kirsty Cassillis' life will change. Her twins will leave home. Her husband, Richard, will drive them to the airport and continue on a business trip, and she will be left in the big house at the top of the hill facing the empty rooms and her empty marriage.

In the tiny village of Blairmoor below, there will be a wedding. Every spare room in every house will be taken up by guests, including her own. Logan will be staying for no more than 24 hours.

And in 24 hours, Kirsty's life will never be the same again.