In an evil hour, fate brought together a native of Russia, and now a Spanish subject, freemason Alex, and a Russian girl, Dasha, a maternal relative of the Dolgoruky princes. But neither her father nor her mother are alive anymore. And the murderers and slaves of Prince Alexei Dolgoruky, Dasha’s uncle, are to blame for this. Alex and Dasha herself miraculously escaped from the hands of the villains. A Spaniard, sent to Russia on a secret and important mission, was robbed, stealing the most important thing - a pink jasper vessel with a potion that controls everything - the mind and life of those who try it. But, unfortunately for Dasha, she fell in love with black-eyed Alex. Their love is mutual. But she herself attracted the attention of the boy Tsar Peter Alekseevich, becoming an obstacle to the marriage of her second cousin Catherine to the Tsar. Dasha finds herself in a terrible story, not knowing who her beloved Alex is...