The daughter's illness became a litmus test for the relationship between Mila and her husband. Anton could not accept the situation and left his wife alone with the trouble. In search of a donor, Mila turns to her sister Karina and her husband Dima. It turns out that he is a perfect match. A huge scandal occurs, Karina accuses her sister and husband of betrayal and does a DNA test, which confirms Dima's paternity. Mila assures that she did not betray her sister and decides to get to the bottom of the truth, because Dima and Karina also have a daughter growing up in their family.