Sevir Yar

The Republic of the Eternal Polar Dawn was always cold, but now an anomalous freeze is destroying entire cities. Only one place is protected: Sevir Yar, the capital, locked behind strict security and impossible to reach. You receive a letter from your brother Alexei, a scientist trapped inside Sevir Yar who desperately needs your help. You take a taxi into the frozen republic, but the car crashes on ice, leaving you stranded in the wilderness