Helena is found dead in a car crash, plunging Fríða into shock. Suspicions of foul play spark an investigation. Fríða keeps the details from Aníta who later uncovers the truth while battling a deepening depression.

Helena, arrives at the police station seeking information about historical abuse in foster homes. Fríða becomes concerned when she learns the foster home belongs to Aníta's grandmother, while Aníta battles postpartum depression at home.

After Helena's funeral, the women argue over Davíð's presence in town. Fríða's investigation points to him, while Aníta uncovers disturbing truths about her grandmother's foster home. Auður confronts Davíð, leading to tragic consequences.

When Davíð's body is found, everything changes. Aníta's mental state deteriorates unnoticed by Fríða. Helena's investigation implicates Davíð, while surveillance footage reveals crucial clues to his death.

Interrogations shift dramatically after new autopsy information. Gusti is concerned about Anita and takes the baby, leading to terrible consequences.

After learning the truth about Helena's death, Aníta returns to work. A family secret drives her to investigate her grandmother's foster home, uncovering ties to Helena's death as other women from the foster home gather for the funeral.

In 1983, Helena arrives at the foster home as Grandma Helga confronts David about his situation with the girls, marking the start of the Black Sands saga.

The search for Anita and her baby continues overnight. Frida finds some important evidence, forcing her to make a critical decision about Anita's future.

Detective inspector Anita returns to her hometown after a 15-year absence. She dreads meeting the people she's long been avoiding. En route, she's called back to duty after a body is found on the shore by Glerársandar.

The appearance of the injured girl changes the investigation of the death of the tourist, but the lack of ambition and mediocre work ethics of the police complicate matters. Anita strengthens her bonds with those who are closest to her.

Gusti interviews Lena and finds out how his colleagues have made a botch of things. Frida's under pressure and the imminent arrival of Gusti to town, which encourage Anita to look for assistance in a familiar place.

Anita makes a serious error while interrogating the girl, and the team tries to get their act together before everything falls apart. The widower arrives in Iceland and shines a light on the case that starts to take on a whole new shape.

The autopsy confirms murder. Salomon visits Helga and Elin while Anita battles Gusti, who has extended his stay. Cold cases lead to new information, and a lovers' soiree takes an unexpected turn.

Another body is found, connected to one of the cases Frida and Anita are investigating. Mother and daughter are taken aback, and Salamon and Anita's relationship creates an unexpected opportunity for the investigative team.

Salomon and Anita's past is more important than anyone can suspect. Ragnar is updated about the status of the case, and together, Gusti and Anita put into action the most challenging project of her career and life.

The world keeps on turning. Anita and Gusti are in a race against time, fearing the worst. The past two years' events become more apparent, and it's evident that together they head for a final reckoning that will change everything.