A space-time anomaly sweeps away three floors of a high school and duplicates them in a wild land in the middle of endless swamps and forests. For high school students and a young teacher, every day becomes a test of survival. A harsh climate, an anomaly open to other dimensions and difficult relationships within the group - the boys and girls will have to pass too difficult exams. Teacher Alina Anatolyevna and Nasta Dashkevich keep diaries in which they describe everything that happens to the group. Their notes, plus the author's text, make up the tense novel 'Three Floors Above'.