A young girl is missing, and her boyfriend dead. Police inspector Hedda Hersoug is back in her birthplace to live a quite life, but is forced to work with the solitaire superintendent Joel Dreyer hunting down a serial killer.

Dreyer suspects that they may have overlooked some details at the scene of the crime and orders an excavation of the area. Skeletons are found buried and the outlines of a mysterious mass grave arise.