The long summer vacation has finally come to an end, and Ekaterina, her beloved brother, and their friends-Mikhail and Flora-are back in the capital for the second semester. After school kicks off and Ekaterina reunites with her classmates, her friend Marina has a genius idea: They should organize a musical evening where everyone can showcase their talents! As a former choir girl, Ekaterina is more than happy to take charge. Her preparations for the event lead her to make the acquaintance of a classmate of theirs named Renato Selesar, a prickly yet adorable boy with an unbelievable talent for music. At the same time, tensions start rising between Ekaterina and Lydia Selesnoa-the daughter of a powerful marquess-who has her sights set on the empress's throne. It appears Ekaterina's recent closeness with Mikhail hasn't gone unnoticed...