It was a vicious, calculated murder. The killer selected his victim at Euston station, followed her home and strangled her. At the same time, killed in the same way, a second body is discovered at King's Cross station. It is a coincidence that eerily echoes the murder of two other women, stabbed to death on the same day months earlier... Could DI Tom Thorne be up against two serial killers working together?
Criminal investigating officer Hanne Wilhelmsen considers the possibility of a serial killer as she tracks down a series of numbers written in blood appearing on walls all over Oslo.
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