On a long November night, ultrarunner Kilian Jornet trains on a never-ending knife-edge ridge overlooking the dark fjords. Way up high, during the frigid windy night, Kilian attempts to make the aurora borealis appear.

The Aurora Borealis (also known as the Northern Lights) and the Aurora Australis are a natural phenomenon created through the interaction between charged particles of the solar wind and the upper atmosphere. The auroras occur primarily in those regions close to the magnetic poles (source: https://wikipedia.org/wiki/Aurora). You can plan for this incredible phenomenon by following the aurora forecast on websites like Aurora-service (https://aurora-service.eu)