Don Juan arrives in Tallinn and soon the gossip spreads like wildfire. The local women trip over themselves to be seduced by him; the men race to defend their honor by challenging him to a duel. What no one knows is that Don Juan is a woman in disguise.
Renowned scientist Dronov works in Novosibirsk on the creation of ultra-modern engine. He has a bad heart, he was afraid not to have time to finish the job, and test engine at a factory in Moscow, unfortunately, is not the first time passes unsuccessfully. Dronov abandons the rest of the work, even the leadership of the Institute entrusts to his disciple Morozov.
Follows the love between journalist Anna Knyazeva and Nikolai Malyshev, a surgeon at one of the city hospitals.
