The midnight hour approaches in an almost empty all-night diner. Mari sips her coffee and glances up from a book as a young man, a musician, intrudes on her solitude. Both have missed the last train home. The musician has plans to rehearse with his jazz band all night, Mari is equally unconcerned and content...
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.