Eberlin's (Laurence Harvey) superiors in Britain instruct him to find and assassinate a KGB agent named Krasnevin, believed to have killed a number of British agents. This presents a problem for Eberlin, as he is Krasnevin. Summoned to a meeting at a country house, he is presented with a photograph of the suspected Krasnevin. It turns out to be his handler and go-between with Moscow.