From the age of 17, Snizhana had to take full responsibility for her younger sister Marina, forgetting about personal desires. Dreaming of recreating a model of her parents' relationship based on trust, love and respect in her own family, Snizhana gets married and completely trusts her husband. But is she doing it right?

Marina, thanks to the tender care and sacrificial love of Snizhana, grew up to be a very direct and cheerful girl. But the sisters' relationship is overshadowed by the situation of the love triangle. Will the girls be able to learn to live in a cruel world of substitution of concepts, where real feelings can be confused with a fleeting eclipse, without making irreparable mistakes?