The plot revolves around the wealthy couple Boris and Olga Morozov. After undergoing tests at a clinic, they discover that their seventeen-year-old daughter Yulia is not biologically related to them. It turns out that their child was switched at birth with another baby. The Morozovs learn that their biological daughter Yana is being raised by the Mikhailov family. This family is drastically different from them in terms of wealth, as they live cramped in a small apartment with five people. The families meet, and the Morozovs express their desire to take Yana back...