Ski-mountaineering in the Austrian Alps with only one working limb. Sailing above the Arctic Circle and west of Greenland. Walking around Annapurna. Working as a doctor in India. Exploring the tribal region of north Pakistan. These are only some of the things consultant radiologist Roger Chisholm has done after being diagnosed with multiple sclerosis, aged 27. This is a life-affirming story of enduring friendships, quiet courage and resilience. Above all, it is a story of a man determined to defy the odds and live life to the full.