An ardent bachelor named Peter is at a party in a casino where he bets his friend Oleh, for his "Porsche", that he can live under one roof with a woman for a month. So, Veronica appears in his apartment - an elegant music teacher, Oleg's younger sister, whom Peter has known since childhood. She left her husband, a tyrant, and has been busy looking for work and a new home. However, the stakes increase when Peter learns about Veronica's children – second-graders who turn the life of the macho bachelor upside down.
