About the book: year / The New Year's ball is about to begin, at which a queen will be chosen among high school girls. But the whole school is at a loss: mathematics teacher Svetlana Sergeevna has disappeared without a trace. She left the house, but never showed up at the ball. Someone saw the strange Father Frost and Snow Maiden near her house. Didn't they drop the big red mitten there? Oleg and his friends from the Company with Bolshaya Spasskaya, having carefully discussed and compared all the evidence and facts, set out on the trail of the missing teacher…