 Film is set in 1980s in Germany and Russia. A major gas pipeline is to be built from Siberia to Europe. German banks are open for discussions about the credit contract for the project. The Russian delegation comes to Germany for business meetings and finds out that the security service is secretly working against the deal. Help comes from the Russian diplomat Nikolai Petrovich Gusev (played by Nikolai Petrovich Karachentsov).