When three very different siblings, Fern, Rowan and Willow, go home for a Christmas reunion at their family home in Edinburgh, it’s not long before some very big secrets threaten their cosy holiday. The McAllister house on Arboretum Road has seen 120 Christmases since its completion. This year, Fern is bringing her gorgeous boyfriend home and she wants everything to be perfect. But her twin brother Rowan would rather go on the pull than pull crackers with the family. And their younger sister Willow is terrified of Christmas Day. With four sleeps till Christmas, three secretive siblings, two hot houseguests, and one juicy secret – this Christmas, there will be some big surprises under the tree.