A group of indispensable works in the Ruhr area on the development of a solar power plant. At first she only finds attention through a former KGB agent who believes that the struggle of the political systems is further fought in the hidden. His views are initially smiled at, but when a young spy causes confusion, there is a feeling of happiness: the apparent paranoia of the Russian friend has tangible causes, and the work of the group is more than just evident.

Four young people from the former GDR want to start doing meaningful things. In spite of adverse circumstances they start the construction of an environmentally friendly solar power plant.