An ordinary Russian guy Vadim Arsenyev from the provincial town of Dymov receives an unexpected invitation from the Serbian prince Konstantin Ostberg with an offer to stay. The prince allegedly read Arsenyev’s recent book about Dionysius the Myopic, a Greek youth, keeper of an ancient secret. Considering the contents of the book incomplete, the prince invited Vadim to discuss together a topic of interest to both. Having set off on a pleasant trip, Arsenyev could not have imagined that the journey would not only drag on, but would turn into a series of dangerous and mysterious adventures!..