Seventeen-year-old Jenny is abducted in broad daylight and taken to a dilapidated, isolated house where she is chained and caged along with several other girls. Their captor is unpredictable, and as wily as he is cruel: he foils every one of their desperate attempts to escape... and once caught, they rarely survive their punishment. Five years later, Jenny is found dead in a public park, and the police are scrambling to find a lead among the scant evidence. But Detective Joona Linna realizes that this murder has an eerie connection to a death that was declared a suicide years before. When Mia, a seventeen-year-old orphan, goes missing, it becomes clear to Joona that they are dealing with a serial killer--whose murderous rampage has just begun. As the police close in on the killer, Mia and her fellow captives are plunged into ever greater danger, and Joona finds himself in a seemingly impossible race against time to save their young lives.