Natrium Chlorid

He has been killing for 30 years. No one could stop him. Until now. The ninth case for Department Q.

On her 60th birthday, a woman commits suicide. Her death leads to the reopening of an unresolved case from 1988, which brings Marcus Jacobsen together with his best investigator, Carl Mørck. Carl, Assad, Rose, and Gordon have no idea that the case will push Department Q to its limits: For three decades, people have fallen victim to a cunning killer who murders without leaving any evidence. He selects his victims and the time of death with care and precision. For thirty years, no one has been able to stop him. And an old case is approaching Carl like a venomous snake that has picked up the scent of its prey...