Folk wisdom says "in love, as in war, all means are good". But what if a man decides to cheat for the sake of the happiness of his beloved girl? Will wisdom work in this situation? Young teacher Marina is preparing for the wedding. Her fiance Volodya is a reliable and well-off person. Only life with him is too boring and predictable: as a former military man, everything is always planned in advance, calculated and laid out on the shelves.