Masha Pavlova is getting ready for the wedding. Her fiancé Victor is a hardworking, self-controlled and very reliable person. And life with him promises to be calm and measured. But on the eve of the holidays, tragedy happens ... Katyusha, Masha's younger sister, who decorates the hall for celebrations, falls down the stairs. Doctors say the girl has brain cancer. An urgent and expensive operation is needed. Masha turns to her boyfriend for help. But Victor believes that ten thousand dollars is a lot of money, Katya cannot be helped and it is unreasonable to sell the purchased apartment. To save her sister, Masha goes to a private clinic in the capital and agrees to become a surrogate mother. She will end up in a family that wants to use their services, get to know them and, carrying a child, will live with them.