Detective Inspector Marita Kaila is called to the scene during a meeting with her father Jakob: A tall building has collapsed and numerous people have died or are trapped inside. Rescue workers try to reach them, but the building is still dangerously unstable - every decision could cost lives. Marita's team begins an investigation at the construction company Paanio Group and talks to the father and son Paanios, who run the family business together. They are quickly declared guilty of the disaster, but their rage turns to horror when it is revealed that the owner's daughter, Linnea Paanio, is also among those buried alive.