The action takes place in the late 1920s in Ukraine. The exposure of a counter-revolutionary agent who has infiltrated the Soviet scientific community. The film has survived without the 6th part.

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Main Cast: B. Mikhaelis, Antonin Pankryshev, Sergei Minin, M. Myurgit, Evgeny Kokhanenko, Stepan Shahaida

Director: Georgiy Stabovoy

Writer: Solomon Lazurin

Editor:

Cinematographer: Yakov Kulish

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