“From the very beginning the day did not bode well, even though it was Sunday. Dad gave me money for the bus and said: “You know what, Katya, you won’t go to the region, you have to go to school on Monday.” Therefore, my mother and I will go without you, and you, in order not to get bored, go to your grandmother. “I won’t be bored here either, I promise!” “I believe that’s why my mother and I decided so.” Let me walk you to the bus...” Could Katya even imagine that behind the door in the wall of her grandmother’s basement, which she opened out of boredom, a strange unfamiliar landscape would open to her, completely different from her usual surroundings? “What is this: an obsession or reality?” - Katya thinks and, together with her best friends, with whom she has more than once found herself in the most dizzying troubles, she steps into the unknown. Then the mysterious door disappears without a trace, and the brave six find themselves face to face with an unknown and mysterious world. To begin with, the guys find a medallion covered with mysterious writings, and then a handsome knight invites Katya to his castle. According to him, the ancient prophecy says...