A small princess in a small kingdom in Adventureland disappears on Christmas eve. She has gone out to find the Christmas Star. The Queen follows and the King curses the Christmas Star, so it disappears for years, until young Sonja arrives.
Princess Fjellrose has never been outside the safe mountain, until her father is sick and dying. Only humans down in the valley can save him. She goes on a dangerous journey, and put their world in danger, in spite of her good intentions.