Romka was just getting ready to describe the events of last summer, when suddenly, while walking with Slavka, he met one of the characters from his future detective story at the subway - a creepy guy who attempted on the life of Slavka’s sister. And then it turned out that ancient tomes had been stolen from the apartment of Slavka’s uncle, a collector of rare books. But why does an inveterate bandit need any books, and not the most valuable ones? What if it’s because of the mysterious initials on their bindings? Romka hatches a cunning plan to capture the villain. Friends get down to business, luck seems very close, but then...