At the zenith of fame and on the threshold of a new discovery, an outstanding biophysicist commits suicide. An absurd and unthinkable death for an active and life-loving person! Friends do not believe in his voluntary death and insist on resuming the investigation into this case. A. B. Turetsky has to plunge into the reserved world of great science, in which truly Shakespearean passions reign and which easily combines geniuses and villains.