During the siege of Leningrad a Nazi bombshell destroys the storage of an experimental medicine institute where deadly dangerous viruses were kept. Severe winter weather prevents an epidemic from breaking out in the besieged city. But the spring is coming, and Leningrad is on the brink of bacterial catastrophe. Doctor Maritskaya and NKWD officer Andreew have only three days to save the city.
| Actor | Role |
|---|---|
 Elena LotovaNot listed | Not listed |
 Kirill PletnyovNot listed | Not listed |
 Evgeniy SidikhinNot listed | Not listed |
 Yuriy ItskovNot listed | Not listed |
 Polina KrasavinaNot listed | Not listed |
 Vladislav AbashinKhotin | Khotin |
 Grigory Chabanagent | agent |
 Igor GrabuzovGorelik, lieutenant of NKVD | Gorelik, lieutenant of NKVD |
 Roman SinitsynGolovach, operative of UGRO | Golovach, operative of UGRO |
 Petr TereschenkoNot listed | Not listed |