Snowboarders and a lone skier travel to Alaska's Glacier Bay National Park to attempt an unprecedented descent of Mount Bertha amid hazardous winter weather. But when a whiteout exacerbates the already treacherous conditions, the entire mission is thrown into doubt.

Elite kayakers venture deep within Ecuador's vast Llanganates National Park to attempt the first whitewater descent of the Chalupas River. With no map, guide, and only one point of emergency access to the outside world, the athletes must rely on one another.

Climbers travel to Kyrgyzstan's Ak-Su Valley to attempt a route on Pik Slesova that has never been successfully free climbed by a single individual. But the partners' dream mission is jeopardised by a COVID-19 diagnosis.

Surfers travel to Africa's West Coast in hopes of establishing its raw, untouched coastline as the next big wave surf location. Forced to be entirely self-sufficient, the team tracks the swell, monitors the conditions, and dodges unexpected storms.