There is an unusual tradition in a small northern town. The morning after the longest night of the year, one household wakes to find a gift at their front door. It is always the same gift: a beautiful and unique hand-woven carpet. What makes the carpet more magical is this: it is always warm. Even when the rest of the room is cold, the carpet remains warm. Over the years, many families have received one. Some have two and some have three. But Katri’s family, for reasons no one can understand, has none. But Katri thinks she might know where the carpets come from and decides to find out.