The little dragon Coconut and his friend Matilda go on a trip to the forest to collect dragon grass. But a storm catches them, and they find refuge in a dark, deserted tower. There, they are dry, but it is also a little scary. It is impossible for them to relax and sleep in front of the fireplace. Because at the moment the clock strikes twelve, a cold wind begins to blow through the corridors and the hall of the tower. And something happens that frightens both friends very much...