How fun it is to race through the snowy taiga on fast snowmobiles! Young people are not at all afraid of the dense shadows of trees, and deep snow drifts, and pitch darkness around, and even the fact that the road has suddenly disappeared somewhere, and the mobile phone cannot find the network. And even when the engines stalled, the boys and girls did not lose their presence of mind and walked through the gloomy forest. But what kind of hut did they come across on their way? Forester's house? Or a shelter? Whatever it is, you can spend the night here, fortunately, there was a stove and even firewood in the house. Get rid of the bad feeling! Who would dare to offend such healthy, cheerful and brave young people? But it was in vain that they opened the lid of the cellar and looked into the underground, where viscous, bottomless blackness froze in deaf silence...