Just before Christmas, little dragon Karydas, the gluttonous dragon Oscar, the hedgehog Matilda, and the elephant-dragon Yuvarlas climb the mountain to find the most beautiful fir tree to decorate in the square in front of the dragon caves. They search and search until they finally find the perfect fir: not too tall or too short, not too thick or too thin, not too straight or too crooked. But just as Yuvarlas is getting ready to cut it down, strange voices are heard from within its branches...