Propaganda film about Soviet inventor Igor Krymov and his entrapment by foreign spies.

Yuri Demich
as Igor Krymov

Nelli Pshyonnaya
as Nora Braun

Leonid Satanovskiy
as Max Beyn

Konstantin Zheldin
as Venson

Sergey Yakovlev
as Uvarov

Viktor Fokin
as

Anatoliy Romashin
as Boris Smolin

Elza Lezhdey
as Uta

Oleg Mokshantsev
as Aleksey Mikhno

Boris Gusakov
as Pavel Zharkov