It all began at the Oyster Bar in Grand Central Station, New York, in 1961 - Two Princeton graduates - John Hopkins and Joe McPhillips - have returned from Peru. Loathe to return to a life of work, marriage and mortgages, they are tempted by a mysterious letter from Kenya. Hatching a plan to ride a motorbike across North Africa, they buy a sleek, white R50 BMW and paint her name - 'The White Nile'...