Darkness: Those Who Kill

Louise is determined to continue working as a profiler and when a couple is found brutally murdered, she takes the case. She assists chief detective Frederik Havgaard, who is convinced he knows who the killer is.

Louise locates Bjørn’s little sister, Maria. Maria's case worker suggests that Louise mentor the young woman. Frederik visits the Breidablik commune where Bjørn used to live with his mother and Maria.

The police hunt for Bjørn is intensified after the new murder. Frederik and Louise uncover truths about Bjørn’s past after a revealing search at Pelle’s.

Another crime is committed, and Frederik is convinced that Bjørn is the perpetrator. However, Louise points to another criminal profile. Bjørn turns to Louise and wants to share a secret that might close the case.

Louise has moved to Aarhus to make a fresh start, but the past catches up with her when she meets Frederik again. He involves her in a new case in which a disabled woman was found dead.

Louise and Frederik discover a connection between Bjørn and Alberte, who both grew up in the municipality of Breidablik. Louise moves into the commune undercover to help the police in their investigation.

Louise’s cover gets challenged. Meanwhile, Frederik discovers that one of Jon's old friends, who also owned Breidablik, perished in a mysterious fire.

Louise and Frederik push Jon to take responsibility for his actions, but once again he takes advantage of his relationship with Alberte. Louise faces the past and finds peace.