－－《華爾街日報》(Wall Street Journal)
警界資深調查員Holger Munch，馬上被任命重新集合他的兇殺案小組。但是要整合這個小組，他必須要說服前搭檔Mia Krüger，一個聰明卻遭受麻煩的探員，從一座她打算結束自己生命的荒島上重返崗位。
When a six-year-old girl is found dead, hanging from a tree, the only clue the Oslo Police have to work with is an airline tag around her neck. It reads ‘I’m travelling alone’.
Holger Munch, veteran police investigator, is immediately charged with re-assembling his homicide unit. But to complete the team, he must convince his erstwhile partner, Mia Krüger – a brilliant but troubled investigator – to return from the solitary island where she has retreated with plans to take her own life.
Reviewing the evidence, Mia identifies something no one else has noticed – a thin line carved into the dead girl’s fingernail: the number 1. Instinctively, she knows that this is only the beginning. To save other children from the same fate, she must find a way to cast aside her own demons and confront the most terrifying, cold-hearted serial killer of her career…