Plot
History teacher Nikolay Echevin on his sixtieth birthday receives an anonymous letter in which he is called the "center of public infection" and threatened with murder.
| Writer | Anatoli Gorlo |
|---|---|
| Director | Vadim Derbenyov |
| Actor | Innokentiy Smoktunovskiy, Vladimir Ilin, Ion Ungureanu |
| Country | Soviet Union |
| Production | N/A |