Nadya and Valya are two sisters. Nadya is a beautiful and frivolous holiday lover, Valya is a serious, intelligent older sister, used to lecturing everyone. After one of her usual club nights, Nadia brought home Alexei, who turned out to be married, but unhappy in marriage. His wife was in complete control of his whole life and every step he took. The sisters decided that they would have Alexei with them first, and then what? Moreover, they did not look so far.