Several years have passed since the police commissioner Eva Thörnblad's daughter Josefine disappeared at the forest lake in Silver Heights. It was considered a tragic drowning accident, but the body was never found. Now it happens again. A child disappears and Eva returns to her hometown to participate in the search, convinced that someone has taken the kids.

Eva is convinced that a recently discovered, severely ill girl is her daughter Josefine. Where has she been all these years? Eva continues to search for answers, and new discoveries lead her to Göran Wass, now with the National Police. Meanwhile, she must contend with an assassin's attempt to permanently silence her questions.

Josefine has disappeared from the hospital and Eva joins the local police force in the search. Her colleague, Tom, suspects Eva of involvement, but the suspicion turns into a burgeoning interest.

Someone has broken into Eva's apartment and left a bottle with unknown contents on the kitchen table. Eva realizes that the dark fluid is what Josefine needs to survive. Meanwhile, the killer hunts for their victims, and Göran Wass of the National Police covers his tracks.

Eva is faced with a fateful choice when she should be taking care of Josefine. Göran loudly proclaims truths better left in the shadows.

Eva decides to set a trap for the creature from the woods, but the plan goes horribly wrong. In despair, she tells Göran what she has done. At the same time, Eva finds a secret chamber that hides great secrets and many answers.

Tom is in bad shape after the assault at the jail but wants to find Esmeralda at all costs.

Eva struggles to master the parasite she swallowed. She has a plan for how she can rescue the missing children and goes to battle with her father's company. Meanwhile, Tom finds evidence that shocks him.

Eva understands more about what happened to her father. Meanwhile, new explosions in the forest bring the creature's anger. The panic spreads and the police seem to lose control completely.

Eva has been forced to leave Silver Heights to save Josefine, but she returns to save the lost children. When Eva makes a miscalculation, the children's lives, and perhaps the entire Silver Heights existence, are at stake.