"Tonight, at twenty-two o'clock, fireworks in honor of the holiday will begin in all cities of Russia. At the same time, there will be a series of explosions that will wipe our university off the face of the earth…Lera Lanskaya, a student at the closed Obolensky University of Sciences and Arts, lost her supervisor at the very beginning of the academic year. The old professor died in an accident, and shortly before his death he gave Lera a strange envelope with an engraving depicting a dead man in exactly the same position in which he himself would be found. Lera begins an investigation, but a new scientific supervisor gets in her way – a young and daring one. When Lera reveals his real identity, it becomes clear that something strange is happening at the university, and she will not be able to solve all the riddles on her own.