Kostya is a Muscovite and an over-protected son of his parents. His aunt Alla, Ph.D. and a great esthete, is concerned about finding a worthy party for her flighty nephew. In her opinion, Kostya’s girlfriend Maya is a way too plain for the boy.
Seeing that Kostya is in love, Aunt Alla decides to provoke a quarrel between them and invites her post-graduate student’s daughter Lera to visit. The jaunty and giggly girl will divert attention from Maya. But the family soon understands that they welcomed a real monster in the house.