Since finding kayaking on a hot sumer day 15 year's ago, Ben Stookesberry has sought out the most challenging river expeditions in the world. But with this challenge comes extreme risk and there is plenty of that where he is going next. When Ben saw the Marble Gorge in California's Sierra nevada Mountains he new he would have to find the right team to have any chance of success. The river is more comparable to the big walls of Yosemite with more vertical drop than El Cap over a stretch of river that is steeper that the cable route up Half Dome. After four year's of waiting, his dream team of expert kayakers and technical climbing specialists is assembled. Meet Forrest Noble, Jared Johnson, Eric Seymour, and Chris Korbulic. Though probably the best possible team for this high exposure mission, they are pushed to their limits to complete this descent of a lifetime.