Catherine is a successful businesswoman who has everything: a career, a cozy home, children. Everything but a loved one. After the nanny of her two children is suddenly released, she is busy searching for a new Mary Poppins for her break-ins. The spoiled babies of a wealthy mother - Frosia and Grishko - survive from the home of all applicants. Due to coincidence, a young man, Cyril, who is taken by his children, gets to Catherine's house. Having passed many ridiculous and funny "exams", Cyril becomes their best friend, and later Katya realizes that it is with him that she can be truly happy.