Sarah Lund and Ulrick Strange return from Afghanistan with new, conclusive evidence, while Brix and his team are looking at what appears to be an important finding in the investigation.
Meyer and Sarah suspect a cover-up when they're told to stay away from Troels Hartmann, but Sarah pursues the case and finds a Liberal party reception room that looks like a crime scene.
The spotlight of the police and media is now trained on Troels Hartmann, and he feels his political career is crumbling. Meanwhile strange things are going on at the town hall with fatal consequences.