Terrible creatures really do exist. Although they do not have sharp fangs and claws. They look like ordinary people. A certain Mr. Stranger sends a manuscript to the editor of the book publishing house Varvara Bonbafiki, which describes in detail the murder of philological institute student Anna Gradova. Everything would be fine, but only a week later the murder actually happens. Everything matches: the location of the murder, the circumstances, and even the name of the victim. Varvara will have to find out personally whether the one who sent her the manuscript is a murderer, because a special story is prepared for her.