A secret State. A dark conspiracy. A terrible crime.

Karin Müller of the German Democratic Republic's People's Police is called to a factory in the east of the country. A man has been murdered - bound and trapped as a fire burned nearby, slowly suffocating him. But who is he? Why was he targeted? Could his murderer simply be someone with a grudge against the factory's nationalisation, as Müller's Stasi colleagues insist? Why too is her deputy Werner Tilsner behaving so strangely?

As more victims surface, it becomes clear that there is a cold-blooded killer out there taking their revenge. Soon Müller begins to realise that in order to solve these terrible crimes, she will need to delve into the region's dark past. But are the Stasi really working with her on this case? Or against her?

For those who really run this Republic have secrets they would rather remain uncovered. And they will stop at nothing to keep them that way . . .