Desc: Opasnye tropy: Directed by Alexander Alekseyev, Yevgeni Alekseyev. With Nikifor Kolofidin, Tatyana Mukhina, Vladimir Druzhnikov, Anatoliy Kuznetsov. In the Ussuri taiga, where an infectious disease is rampant, a saboteur acts to prevent Soviet microbiologists from conducting research on the causes of the epidemic.