It was supposed to be the ultimate living lab for urbanization: The Experimental City. A megalomaniac plan developed in the 1960s to show that the growing problems of big cities could be resolved. Air pollution, mobility, waste collection, energy use: the city offered a solution for everything. It was a utopian paradise of cutting-edge construction for 250,000 inhabitants, situated in rural Minnesota. Self-driving cars, recycling and re-use, solar power, and a huge geodesic dome designed by Buckminster Fuller to ward off weather and climate. It was the ultimate dream of scientist Athelstan Spilhaus, who published his futuristic predictions in a weekly newspaper comic, inspiring millions of Americans to dream of a new world within their grasp. The film is a fascinating journey through time, filled with attention-grabbing science fiction from the 1960s; 50 years later, it seems more relevant than ever.