The Ark (2007)

From the permafrost of the North to the thirty-degree heat of Adler, a train carries residents of the polar Urengoy to the Black Sea through 4,500 kilometers of Russian expanses. In the cramped space of a reserved carriage, in six days, fellow passengers - either by the will of the highest authority, or by chance of dropped tickets — will become the closest people in this tiny space for some time.