Talking birds are not a miracle. And crows speak even better than parrots. But when the first raven you come across reports the fate of the girl, the whole village is busy searching for her, you will inevitably be surprised. Or... are you scared? After all, there are dense wilds all around, and somewhere nearby a disastrous swamp begins. The investigation led the twins Petya and Vasya into the thicket. The detective brothers are not timid, but what kind of strange sounds are coming from the bottom of the ravine? It seems that the disappearance of little Ksyusha is not the only secret that the dark forest hides from strangers!