At the height of Zarta's fully automated society in the 22nd century, their automated factory produced one of the first city builders. It was seen by the people as a great triumph, one of them most complex machinery ever built. In less than a month, it was to construct a city to the people's expectations. Unfortunately, the city builder went berserk, building more cities. The other machines then began to go berserk, supplying the city builder with more material.