Кто первый встал, того и тапки

In family life, there are many advantages, but you need to get used to them.
Lyusya Lyutikova is getting married to Professor of Mathematics Vlad Siberikov. The future newlyweds are discussing the upcoming celebration when the doorbell rings. On the doorstep... stands a woman with an infant — Vlad's daughter, of whose existence he was completely unaware. Along with the girl comes a round-the-clock nanny. Soon the nanny runs away, someone assaults Lyusya and tries to kidnap the baby. Lyutikova is in a panic. She goes to her friend, investigator Dubchenko. Lyusya is smart, has an excellent sense of humor, and is capable of unraveling the most complicated case. Especially if there's a chance to prove to everyone once again what she's really worth.