Detective Patrik Hedstrom is no stranger to tragedy. A murder case concerning Fjällbacka’s dead financial director, Mats Sverin, is a grim but useful distraction from his recent family misfortunes. It seems Sverin was a man who everybody liked yet nobody really knew. His high school sweetheart, Nathalie, has just returned to Fjällbacka with her five-year-old son. Perhaps she can shed some light on who Sverin really was. However, Nathalie has her own secret. If it’s discovered, she will lose her only child. As the investigation stalls, the police have many questions. But there is only one that matters: Is there anything a mother would not do to protect her child?

Christian Thydell’s dream has come true. His debut novel, The Mermaid, has been published to rave reviews. So why is he as distant and unhappy as ever? When crime writer Erica Falk, who helped Christian discover and develop his talents, learns he has been receiving anonymous threats, she investigates not just the messages but also the young author’s mysterious past. Then, one of Christian’s closet friends, Magnus, goes missing. Erica’s husband, Detective Patrik Hedström, has his worst suspicions confirmed as the mind games aimed at Christian become a disturbing reality.

Crime writer Erica Falck is shocked to discover a Nazi medal among her late mother’s possessions. To uncover her family's past, Erica must read her mother’s wartime diaries. Could what little knowledge she has be enough to endanger her husband and newborn baby? The dark past is coming to light, and no one will escape the truth of how they came to be.

The Stranger appears out of nowhere. His identity is unknown, and his motives are unclear. But his information is undeniable. He whispers a few words in your ear and disappears, leaving you picking up the pieces of your shattered world. Adam Price has a lot to lose: a comfortable marriage to a beautiful woman, two wonderful sons, and all the trappings of the American Dream. Then he runs into the Stranger. When he learns a devastating secret about his wife, he confronts her, and the mirage of perfection disappears as if it never existed at all.

The remote resort town of Fjallbacka has seen its share of tragedy, though perhaps none worse than that of the little girl found in a fisherman’s net. Local detective Patrik Hedstrom has the grim task of discovering who could be behind the murder of a child he knew well. What he does not know is how this case will reach into the dark heart of Fjallbacka, spanning generations and ripping aside its idyllic façade.