Sam Anthamatten (ski) and Victor De Le Rue (snowboard) push the boundaries in the wildest corner of Alaska. A bush pilot drops the small crew of five on a remote, unexplored glacier to conquer the spine walls in a series of ascents, each one more challenging than the last. With honesty and a touch of irony, director Jérôme Tanon describes what exactly is going on here. Above all, he wants to feel what it’s like to be in their shoes, to understand what motivates free riders, what makes the sport so appealing to some.