The discovery of a man's body in a frozen lake forces Detective Patrik Hedström to confront a cold case that threatens to unravel the quiet community of Fjällbacka. As Patrik investigates the victim's past, he finds himself entangled in a web of long-buried secrets and local tensions that have festered for decades. His wife, Erica Falck, simultaneously pursues her own research into a historical disappearance, inadvertently drawing parallels that complicate the official investigation. The narrative shifts between the present-day police procedural and the haunting echoes of the past, maintaining a steady, methodical pace that emphasizes the psychological weight of the crimes.

This work is widely recognized as a staple of the Nordic Noir genre, noted for its ability to balance intricate police procedural elements with deep character studies. Readers often highlight the author's skill in weaving together multiple timelines to create a cohesive and suspenseful mystery. The setting of Fjällbacka serves as more than just a backdrop, acting as a catalyst for the secrets that define the community's history. The prose is frequently praised for its clinical yet evocative style, which keeps the reader engaged without relying on excessive violence or sensationalism.