James MacKinnon and Alisa Smith, authors of "The 100 Mile Diet", try to sign up the residents of Mission, British Columbia on the diet for 100 days. In doing so, they are encouraging people to think about where their food comes from in order to eat more healthily and sustainably. To their amazement, they sign up dozens of families for the challenge. The pair will follow six to monitor their progress for the 100 days: the Clark/Vernons, the Haweses, the McIntoshes, the Peterses, the St. Cyrs and the Weremchuk/Williamses. Each family signs up for a different reason, but James and Alisa feel that this change in lifestyle will benefit some more than others, especially those that have very poor eating habits and resulting possible health issues.