The Valhalla Murders is an Icelandic crime thriller series that follows the story of a detective named Kata who returns to Iceland after working for the FBI in the United States. She is assigned to a high-profile murder case that leads her to uncover a series of brutal killings that are connected to a dark secret from the past. As Kata delves deeper into the investigation, she must confront her own demons and navigate the complex web of lies and corruption in order to catch the killer. The Valhalla Murders is a tense and gripping series that combines elements of Nordic noir with a compelling character-driven narrative.