The main character, Matko (Ivan Djuricic), the dormouse, gives the children a step-by- step overview of the causes and unfortunate consequences of forest fires. A wood is on fire because of human negligence. The animals are endangered. The firemen fight the fire with superhuman efforts. Rain, wind and sun contribute to the disaster leaving behind a barren area. By planting trees, the children save the landscape. The cartoon ends with the slogan "Don't play with flames and smoke, fire is no joke!"