How Petrus saved Kolyada

Petrus Lelechenko lives in a modest hut on the outskirts of the village near the forest. A boy as a boy, but not an ordinary one. Little Lelechenko, like his father, is a chemical planter. Once before the Kupala holiday, Petrus got into an incredible adventure: he found a magical fern flower, saved the world and his life. And he also discovered that beyond the boundaries of ordinary human existence there is a realm of invisible spirits and mysterious beings.
But the adventures did not end there, because whoever raised the sword against the darkness will stand among the defenders of good forever. And the black goddess Mara is not sleeping, planning a new disaster. In the darkest time of the year, when the nights are the longest, the coldest frosts, when a new sun is born and a new year is born before Christmas, let Petruse go on a new journey. The fate of the world depends on the courage of a twelve-year-old boy, and also on the skill and wisdom of his friends: Dream, Owl, Spark, Auka and the three-headed snake...