In the thirteenth novel in the New York Times best-selling series, brilliant rogue police investigator Harry Hole is back, this time as an outsider assembling his own team to help find a serial killer.

Harry has gone to Los Angeles to drink himself to death, in the wake of his life back in Oslo falling to pieces. He's nearly managed to, but Harry has been helping an older film actress, Lucille, to get away from the grips of a drug cartel to which she owes one million dollars, and in return she's given him shelter, company and a tailored suit.

In Oslo, two girls have disappeared and been found murdered and one of the suspects is a well-known real estate magnate. Katrine Bratt wants to bring in the country's foremost serial killings expert, but the idea of collaborating with Harry Hole is out of the question for the chiefs of police. The real-estate magnate under suspicion on the other hand wants to hire Harry as a private investigator to clear his name from the case. Harry declines, but that's before the drug cartel takes Lucille hostage. If Harry achieves the task, the real estate magnate will award him a bonus enough to cover Lucille's debt. He puts together a team consisting of a cocaine-dealing childhood friend, a corrupt police officer and a cancer-stricken psychologist. The drug cartel has given them ten days. The clock is ticking, and a blood moon has been forecast over Oslo.