Danger lurks in the depths of the forest.Menacingly dark clouds tower over the island off the Swedish coast when Commissioner Sanna Berling finds a dying young man on an abandoned farm whose sight burns forever into her memory. Its body is covered with wounds. He desperately wants to tell Sanna something with his last breath, but before he ends the sentence, he is dead. Together with her partner Eir Pedersen, she feverly takes up the search for the cruel killer. Her instinct takes the two investigators deep into the dark forests of the Swedish Island. There, in the impenetrable thicket, a nameless danger seems to lurk. And Sanna feels how at the same time the shadows of the past mercilessly crawl closer..