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Young scientist Alexey Romanovich invites all his colleagues interested in his experiment. 
Among the guests are collector, the member of the Scientific Council, also we see the father and son, who are devoted to science, 
but, clearly, have different intentions for the Alexey Romanov's experiment.
The real reason of the scientific project's presentation is the mentor of Alexei Romanovich - Pavel Egorovich.
At the scheduled time, everyone comes to the laboratory of young scientist.