Europe, 1709. Russia and Sweden are at war. Two French duelists are exiled by King Louis XIV of France: one to the side of Czar Peter the Great of Russia, the other to the side of King Charles XII of Sweden. Although separated by war and allegiance, fate has not finished with them.
There is a seven-year war, Russian soldiers are forced to fight for the interests of France and Austria against Prussia. The midshipmen continue to selflessly serve the Motherland. One is on an expedition, the other is at court, and the third is sent to Venice to hand over a jewelry box. In fact, there is a message in the box, on which the future fate of Europe and Russia depends!
