The film's plot is based on the real murder of the Soviet diplomatic courier Theodor Nette abroad. The pouch of the Soviet diplomat, which is stolen by British spies, is taken away by the sailors of a ship sailing to Leningrad who deliver it to the authorities. The intelligence agents make every effort to retrieve the bag.
| Directing | Oleksandr Dovzhenko | Director |
| Writing | Oleksandr Dovzhenko | Writer |
| Writing | Boris Shcharansky | Writer |
| Production | Oleksandr Dovzhenko | Producer |
| Art | Heinrich Beisenherz | Art Direction |
| Writing | Yurij Yanovskyi | Writer |
| Writing | Moisei Zats | Writer |
| Camera | Nikolay Kozlovsky | Director of Photography |