A postman hands a letter to a young, beautiful, well-off blonde woman. When he leaves the apartment, she is dead. During their investigation, Marc, Niki and Rex discover that the perpetrator stayed at the crime scene for an unnecessarily long time. When a second young woman similar to the first victim is murdered and witnesses saw a postman near the crime scene, investigators think that it is the same perpetrator who specifically selects the victims.
—mgallegog