"An Accidental Death?" - Reporter Annika Bengtzon is working on the story of a devastating crime when she hears that a journalist investigating the same incident has been killed. It appears to be a hit-and-run accident. "A Series of Murders" - Several brutal killings follow - all linked by handwritten letters sent to the victims' relatives. When Annika unravels a connection with the story she's writing, she is thrown on to the trail of a deadly psychopath. "The Hunt is On" - Caught in a frenzied spiral of secrets and violence, Annika finds herself and her marriage at breaking point. Will her refusal to stop pursuing the truth eventually destroy her?