This can be called dizziness from success. A charming woman, who unimaginably combines beauty, sex appeal and intelligence, meets with a former captain of the Russian army, Maslov, who recruits her into Soviet intelligence. Mata Hari will have to engage in industrial espionage and help improve trade and economic relations between the USA and the USSR. The fatal beauty takes an extremely risky step and becomes the mistress and then the wife of the head of the Federal Patent Office, Mark Spencer. Now all economic secrets are in her bed. And it seems that the husband does not notice how his wife is secretly rummaging through his secret documents and that she has a lover - Werner von Mirbach, who once led her into the dangerous world of espionage...