A woman's body is found. By coincidence, Inspector Dellwo and his colleague Sänger are able to determine the identity of the dead very quickly. But when reconstructing the last hours of the murdered woman, they encounter numerous inconsistencies. A lot of what the dead man's husband says doesn't go with the commissars' findings at all. To make matters worse, at least that's how Commissioner Dellwo sees it, in this case toonor the BKA put in front of the nose. Dellwo finds that these BKA colleagues not only behave arrogantly, but actually hinder him and Charlotte Sänger in their work. Werner Fromm, head of the homicide squad, tries to mediate between the parties - with little success. When Inspector Singer finds a crucial clue to the perpetrator, they act on their own and maneuver themselves into a very dangerous situation.