Throughout their careers as professional skiers, Anna and Nat have both constantly been challenged by fear. Yet, despite being brought up under the same roof, they have learned to deal with it in almost contrasting ways, neither leading them to the success they dreamed of. A heartfelt journey on the knife's edge of big mountains throughout Canada and France push them to their physical and emotional limits. The extreme skiing mecca of Alaska pushes them beyond. The Australian sisters soon realise that the most important lessons lie within each others' approach. Equipped with greater insight, they negotiate the fine balance between staying in their comfort zone and taking too much risk, learning that sometimes to move forward, you need to understand what is holding you back.