Неотправленное письмо (1960)

Four geologists venture into the Siberian wilderness in search of diamonds and a chance at wealth. After months of searching, they discover a massive diamond mine hidden in the rugged landscape. They begin the journey to Moscow to report their find when a devastating forest fire traps them in the wilderness. Facing dwindling time and surrounded by flames, they must work together to survive and return to civilization before the fire destroys their discovery.