Kirsty has planned the perfect Leap Day wedding.

And it's all falling apart...

The Scottish Highlands are in the middle of the worst snow storm in decades. Cell towers are down, electricity is out and roads are closed.

In true Invertary style the town's folk have decided to ignore the weather and carry on with the party. Kirsty is at the castle, in the middle of her hen-night and having second thoughts about the wedding. Lake is enduring his stag-do at the town's only pub, helpfully organised by his "best man" eighty-nine year old Betty. Rainne, Lake's sister, has come back to town after three years away to not only attend the wedding, but to see if Alastair will give her a second chance to love him. Oh yeah, and a whole bunch of men with guns have surrounded the castle!

The castle is under siege. The town is under snow. The men are stuck at the pub and the women are on their own. With emotions running high, snow falling hard and lives on the line, the residents of Invertary are about to stage the wedding of the century.