38-year-old Natalia was tired of the suspicions of her 23-year-old lover, who began to doubt the relationship with their 5-year-old son, and she demanded a DNA test. The young man has been raising a boy since birth, and he calls him dad, but the man believes that every year the child looks more and more like Natalia's ex-husband. There are rumors among the locals that the real father is another secret lover of a woman who has always been considered a faithful family man. So how many envelopes will have to be opened before it becomes known from whom Natalia gave birth to her son?