Moving to Belarus is not a teenager's dream come true. However, sixteen-year-old Wojtek has no choice, because his father received a lucrative job offer there. Perhaps it will help him break free from the memories of his mother's death and start living in the present. Wojtek has no idea that what he will meet at Lake Świteź, made famous by Adam Mickiewicz, will change his life forever.

Svetlana dreams of becoming an ordinary girl - going to school, having friends, perhaps falling in love. A seventeen-year-old is disturbed by one fact - she is a rusalka, a drowned girl, a demon who, by its nature, should attract and kill people as soon as they enter her territory.

When the paths of the two cross, their lives will change. Their love was born slowly, in unfavorable, in mysterious circumstances. But will it be strong enough to resist the demons and the malevolent forces of nature?

The author takes us to the world of Slavic mythology, full of creatures we know from the stories of our grandparents.