On a cold winter's day, a preschool teacher is shot to death in front of parents and children at the Jewish Congregation in Stockholm. Just a few hours later two Jewish boys go missing on their way to tennis practice. A heavy snowstorm hits Stockholm and the traces of the perpetrator are few and far between. Fredrika Bergman and Alex Recht are faced with one of their toughest challenges ever as they hunt for a killer that seems as merciless as he is effective.