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Danilo Kazhanivsky sold his soul to the devil. How many girls' souls he ruined! When one girl committed suicide, the Cossack Ilko Kosozub gathered people for revenge, and Danylo was burned.

Almost a hundred years have passed. Roman Kazhanivsky is planning a wedding in Myrhorod, and his fiancée Lisa should be happy if it weren't for the coldness between them. Instead, she thinks more and more often about Yaroslav, Roman's cousin and the owner of the Bat's Nest estate. Black tongues say that he is even worse than his ancestor. But she is irresistibly drawn to him. Between them is an abyss and sharp fragments of the past. In order not to lose Lisa, Roman tells her that Yaroslav is a real monster. But gradually Lisa realises that a real monster is not always the one with black wings.