Olga and Iryna Kotovy are sisters who live together and happily in their village until Vyacheslav, a neighbor, appears. And they both fall in love with Slavko, together, at first sight. Slava chooses Irina, and Olga takes a desperate step - she turns to the local soothsayer Glafira for a love spell. Glafira warns that the potion "Black Blood" will change the lives of the whole family, and Olga's short female happiness threatens to turn into a curse for the whole clan, from which it will be almost impossible to get rid of. Only the death of a loved one will remove it.

But Olga's love is blind, and the spell works. The prophecies of the witch come true - one by one the sisters lose loved ones, and their children can not find happiness in love. How many trials will the great family have until they get rid of the curse, and was it really magical?