Based on a radio play by Elena Antalova. The original psychological chamber story, centred on the relationship between a mother and daughter condemned to forced cohabitation, in which the wrongs and traumas of the past gradually emerge in the fate of a family marked by a tragic secret, has been expanded in the television version to include a retrospective narrative, capturing the turning points of social change and their impact on the characters and relationships within the family. As the mystery surrounding the tragic death of the youngest daughter is gradually revealed, the dramatic tension and development of the two women's relationships builds suggestively towards the shattering discovery of the truth, the dilemma of punishment and its meaning, and the cathartic reconciliation.