Not being able to implement his invention in his home country, engineer Arrowsmith, the author of the patent for ore flotation, goes to the USSR to work at one of the flotation plants, where he soon learns that a group of Soviet engineers is conducting similar work.

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Main Cast: Boris Livanov, Boris Svetlov, Maksim Shtraukh, Andrei Abrikosov, Sergei Tsenin, Viktor Stanitsyn, Oswald Glazunov, Vera Maretskaya, Vladimir Uralskiy, Dmitriy Kara-Dmitriev

Director: Aleksandr Stolper

Writer: Sergey Yevlakhov

Editor:

Cinematographer: Boris Kozlov

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