A snowstorm overtakes a group of poorly prepared tourists in the mountains of the Subpolar Urals, who have gathered for a hike “on the Internet.” Alla understands that the group is on the verge of death. They have a wounded man, and they can’t overcome the pass. Death, terrible, senseless, showers them all with an icy breath. The freezing group is found by Mark Ledogorov and escorted to the taiga cordon, more like an ark. It seems that a miracle happened, everyone was saved, but... who is this Mark Ledogorov? What is he doing here? Why does he shoot like a sniper, his cordon - or ark! – can’t be found on any map, but in the deep taiga forest there is a well-groomed ski track? When a mysterious and inexplicable murder occurs at the cordon, the matter becomes completely confused. Mark Ledogorov is sure that all members of the tourist group are lying to him. For what purpose? Which of them ended up here not by chance? Mark and his friend Paul have to not only unravel a terrible mystery, but also understand themselves, find love and find salvation - after all, the ark was invented in order to be saved!..