Imagine living hundreds of miles from your nearest neighbor or grocery store and having mail delivered by airplane a few times each year, and battling the long, harsh winters with temperatures that plummet to -51 degrees Celsius. Such are the living conditions chosen by the hearty few who inhabit America's last frontier: the Alaskan bush-a spectacular land of rivers and mountains so remote that you'll enter the lives of four families who have turned their backs on civilization to fulfill their dreams of living off the land.