One day Greg Mortenson set out to climb K2 - the world's second highest mountain - in honour of his younger sister, but when another member of his group fell ill, they turned around and Greg became lost in the mountains of Pakistan. He wandered into a poor village, where the chief and his people took him in. Moved by their kindness, Greg promised to return and build a school for the children. This is the remarkable story of how, against all the odds, Greg built not only one but more than sixty schools in Pakistan and Afghanistan, and how he dedicated his life to establishing literacy and peace, and understanding.