World record marathon runner Fiona Oakes is the fastest woman in the world to run a marathon on all seven continents and the North Pole. Oakes has competed internationally in more than 50 marathons and set five marathon course records around the globe, including Antarctica. In 2015, she ran six marathons in six days on six continents. Oakes’s achievements are all the more astounding considering at age 14 she was told she’d never walk properly,let alone run, after more than 17 knee surgeries, including the removal of her right kneecap. The documentary tracks Oakes’s attempt to complete yet another endurance feat, a 250 km race through the Sahara Desert.