A little girl is abducted from a crowded train. Her mother, left behind at the previous station, alerts the crew immediately. But as the train pulls into Stockholm Central Station, the girl is nowhere to be seen. To Inspector Alex Recht of the Stockholm police, this looks like a classic custody row. But none of the evidence adds up and Investigative Analyst Fredrika Bergman is convinced the case is far more complex. So when the missing child is found dead with the word UNWANTED scribbled on her forehead, the rule book is thrown out of the window. Will Alex and Fredrika find the killer before it's too late?