With his North Sea crime novels, the atmospheric "Dunes" mysteries featuring the investigator duo Tjark Wolf and Femke Folkmer, Sven Koch has made a name for himself. Now, with "Kalte Sonne," he presents his first psychological thriller centered around an atmospheric natural phenomenon observable in Danish Jutland. Sort Sol, the black sun, transforms the stormy autumn in Denmark into an eerie backdrop for a chilling psychological thriller: While gigantic flocks of birds darken the sky over Jutland and images of flooding dominate the news, 35-year-old Maja sees something on television that is impossible: The man walking in the background is Erik, her deceased husband! However, Erik's body was pulled from the sea five years ago and was definitively identified through DNA matching. Maja begins to confront their shared past.