The German Wirtschaftswunder is in full swing and the small town of Winden has a bright future ahead. It has been selected as the site for the first German nuclear power plant. Plans for a new housing development are also in the works. The ambitious businessman Bernd Doppler is the driving force behind plans for the power plant. When the bodies of two strangely-clad children are discovered on the building site, he suspects someone is conspiring against him. Shortly thereafter, his own son disappears and the Winden police start an investigation.