A man is shot dead in broad daylight in Cologne city center. The bullet was fired from 700 meters away and went straight to the heart. Chief Inspector Freddy Schenk believes he knows the murder weapon that can hit the target with pinpoint accuracy from such a great distance. The victim, Charly Hecker, was a successful businessman who apparently had never done anything wrong in life. During the interrogations of Hecker's young wife Franka, something happens to Inspector Ballauf that should not happen: He falls in love with the murdered man's widow and begins to meet her secretly.