"He forgot that they were just a short distance from a well-traveled hiking trail, kissing her hungrily. She pulled down her own pants, turned and leaned forward, grabbing a tree with both hands."Fred and Anna have been together for thirteen years. They are approaching fifty and their relationship is a good one, but they are both missing something; they have lost their spark and imagination. But one Saturday in early December, while hiking among snow-covered fir trees on the Sörmland trail, Fred gets an impulse that sparks a new phase in their relationship. And with the help of a very special advent calendar, they begin to explore a new dynamic, which turns out to be just the piece of the puzzle that has been missing.