1911, A graduate of the Institute of Noble Maidens, Sasha Meshcherskaya returns to a small provincial town. The well-being of her family is based on her relationship with her loving uncle, the owner of the arms factory Nikolai Shumilov. Sashenka's parents: Prince Ivan Sergeevich Meshchersky and Maria Ilyinichna dream of their daughter's early marriage, and she herself dreams of a brilliant career as an architect. Wanting to please her parents, Sasha makes new acquaintances and instantly plunges into a whirlpool of intrigue, where political interests are at stake above personal passions. Cold-blooded murders and blackmail, intricacies of conspiracies, daring provocateurs eluding detection - all this captivates the enthusiastic schoolgirl, who experiences mortal melancholy from the paucity of life prospects. Without noticing it, Sasha becomes an ideal target for terrorist hypnosis.