White Christmas? No, on this December 24th, there is only snow on the high mountains. Nevertheless, Konrad and his little sister Sanna are excited. Because it is so warm, they are allowed to hike over to their grandparents in the neighboring valley. In the evening, they want to be back home with their parents, but suddenly it starts to snow heavily on the way back. Everything quickly turns white. The children can no longer see the landscape and cannot find the way. They continue to climb higher into the mountains until there is only ice and snow around them. Silent night, holy night... icy cold night. Will it be their last?.