Harry Hole is sent to Sydney to investigate the murder of Inger Holter, a young Norwegian girl, who was working in a bar. Initially sidelined as an outsider, Harry becomes central to the Australian police investigation when they start to notice a number of unsolved rape and murder cases around the country. The victims were usually young blondes. Inger had a number of admirers, each with his own share of secrets, but there is no obvious suspect, and the pattern of the other crimes seems impossible to crack. Then a circus performer is brutally murdered followed by yet another young woman. Harry is in a race against time to stop a highly intelligent killer, who is bent on total destruction.

Translation of: Flaggermusmannen.