The Ural Mountains, Soviet Union, January 1959. Nine experienced hikers set off into the wilderness. The mountain they camped on was Kholat [music] Syakhl. In the Mansi language, that means Dead Mountain. Three weeks later, their tent was found. It had been cut open [music] from the inside. They fled into the darkness, barefoot. Their injuries were equivalent to a high-speed car crash. Yet, there was no external bruising. One woman was missing her eyes >> [music] >> and her tongue. Soviet authorities closed the case, blaming [music] a compelling natural force. Decades later, the lead investigator admitted [music] he was ordered to hide what they found. He never revealed what that was. Reopened in 2019 and closed again. Some secrets are buried too [music] deep. Follow for more.