Student Sasha, under the patronage of his aunt, expert philologist of the Investigative Committee Victoria Berseneva, got a job teaching Russian to foreigners at a military communications institute. Of course, he was preparing for the fact that Afghans are people of a completely different culture. However, after talking to them closer, Sasha began to consider them almost aliens! Before he had time to establish contact with students and get involved in the workflow, he became one of the suspects in the case of the disappearance of the head of the department, Karolina Sergeevna Ivanova! She had many ill-wishers, all teachers and some students under suspicion. And to find out where Carolina disappeared, Sasha will have to apply all the skills that he gained by working with Victoria on the most complicated cases, because she knows how to calculate criminals without even leaving home, according to only texts...