Temenyburg. The Secrets of the "Polar Star"

Soon after Mark's birthday, his house in Smolensk burns to the ground. A few days later, the boy receives a mysterious letter: he now owns a mansion in St. Petersburg. But this building hides a secret — a passage to Temenyburg, an island that is not on the map.

Behind the ancient facade lies a huge courtyard-well, where shadowy figures live, and the doors of the house open with a tickle. Gradually, Mark notices other oddities. Windows that are always ajar, plaintive sounds and… guests! In his house, which turned out to be a hotel, live eccentric people who hardly leave their rooms. When a fire breaks out here too, and an antique mirror shatters in Mark's room, the boy decides: it's time to uncover the secret of this place. But who can he trust — the mysterious Madame, the absent-minded Count, or the observant great-granddaughter of the witch, with whom he goes to school? And how exactly is Mark connected to the secret of Temenyburg?