Who can better lie, women or men? Everything will be settled, when the disarmingly handsome Oscar winner - Jean Dujardin ("Artist", "Made-to-measure") will challenge the deceitful duel of the beautiful star Quentin Tarantino - Mélanie Laurent ("Basterds of War", "Illusion") in the new comedy of Laurent Tirard - director of hits: "Mikołajki" and "Tailor-made guy". One of the authors of the script is Grégoire Vigneron, co-creator of the production "Woman on Mars, man on Venus". Lying is a real art, and they know it best. Everything, of course, in the name of ... love!

He - Captain Neuville (Jean Dujardin), is a scrupulous, cunning ... coward. She - Elisabeth (Mélanie Laurent) is a sincere, thoughtful and honorable sister of the innocent Pauline, or the officer's fiancée. One day a man has to leave urgently, but assuring his beloved about his feelings, he promises that he will often write to her. Unfortunately, no letter ever reaches Pauline, desperate. Elisabeth decides to take matters into his own hands and, pretending to be an irreverent Neuville, begins to write false messages to the abandoned fiancée. One day the captain unexpectedly returns home. Out of concern for the sensitive heart, Pauline, Neuville and Elisabeth are forced to make more lies. A woman and a man outdo each other in increasingly sophisticated stories, and their finesse knows no bounds. In lies, however, you can easily get lost.