Blood of the White Night. Book 1. Maria Kazantseva

Second passages are scattered throughout St. Petersburg. The Hall of the Night, which hid behind them, is the ancient capital of magic, protected by an impenetrable barrier. For many centuries, the border between the two worlds remained invisible to the world of people until one day was violated.

Complex trials lead the heroes to each other, and their fate will be closely interwoven in an attempt to untie the protracting node of ancient secrets.