On January 23, 1959- a group of young Soviet hikers set out on a 16-day skiing expedition to the peak of Mt. Otorten in the Ural Mountains of Russia.
When the group never returned home, search groups were dispatched and came across the remains of the group's tent which was sliced open from the inside; in it, were all of the hikers' gear and belongings (including their shoes), but no sign of life.
The day they found the tent, investigators also found five of the hikers' bodies scattered throughout the snowy landscape nearby, but it would take FOUR MONTHS before they found the remaining four hikers... and when the autospies on those last bodies were conducted, the BIGGEST mystery in all of Russian history was born.