The alpine mountains of the Swiss Jura set the stage for a natural drama – the epic tale of two cities. On the surface, they appear almost identical – but over the course of a year, these cities will experience dramatically different fortunes. Like any city, they’re made up of social networks and transport infrastructures, to keep the inhabitants informed and fed. But unlike our urban jungles, these cities are made and run by wood ants… The story is told, almost like a medieval saga: David Attenborough is our guide through the mysterious realm of ants, presenting a cast of queens and workers, scouts and soldiers with all their amazing stories.