The special department “Q” of the Copenhagen police was created to investigate the most important and complicated cases. But why should he take on a case that was closed many years ago and, in addition, the perpetrator of the crime is already in prison? And how did it even end up on the desk of Vice-Commissioner of Police Karl Mörck? Apparently, someone is very interested in ensuring that the brutal murder of a brother and sister on a summer vacation is not forgotten, and the former suspects are those who survived. ten years later they came out of the shadows.