Based on the infamous Dyatlov Pass Incident, the film follows nine hikers (Igor Dyatlov, Zina [Zinaida] Kolmogorovna, Rustik [Rustem] Slobodin, Kolya [Nikolai] Thibeaux- Brignolles, Alexander Kolevatov, Sasha/ Alex [Semyon] Zolotaryov, Lyuda [Lyudamila] Dubinina, Georgiy [Yuri] Krivonischenko and Yuri Doroshenko) and the investigators following their disappearance (Bogdan Vasiliev and Marta Ivanova) as they are caught in a web of 1950's Russian military operations and censorship.