Police officers tell of the murder investigations they can never forget. In the premiere, forensic scientist Sonny Björck talks about the hunt for the police killers in Malexander, an insane act that shocked even refined police officers.
Hörby, Easter 1989, a 10-year-old girl meet with her friends. She would never come home again. Six days later, she is found murdered. Local DI Alf Andersson in Eslöv is reluctantly given the task of leading his first murder investigation.
On the night of December 4, 1994, Stockholm was hit by one of Sweden's worst mass shootings ever. After being refused entry to the nightclub Sturecompagniet, two young men return armed with an automatic rifle.
On Jan 29, 2006, a mother and her partner report that their 10-year-old son Bobby has disappeared from a parking lot in Gothenburg. A major search effort begins immediately. Pretty soon, the police suspects the mother and her partner.