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.

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.

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.

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.

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.

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