Facing the biggest challenge of his life, the former cyclist opens up about his journey with terminal cancer and how the mental strength he honed as a six-time Olympic gold medallist is now helping him to inspire others. This documentary follows Chris from the early stages of planning a brand-new cycling event through to being joined by friends, including tennis star Andy Murray, at the end result in Glasgow: the Tour de Four, a bike ride with the ambition to raise a million pounds for charity and show fellow sufferers that it's possible to stay active throughout treatment