Chronicles three years of a middle-class family seemingly caught up in their daily routines, troubled only by minor incidents. Behind their apparent calm and repetitive existence, however, they're planning something much more sinister.

Georg, who is happy with his job as a scientist, with his loving wife and with his three children, hears one day that an accident has happened in a chemical plant nearby. All of a sudden, he finds himself face to face with one of the victims. The man, whose face has been eaten away by the sour gas that escaped from the plant, is staring at him in despair. Does Georg really see the man or is this a mere hallucination? Is he becoming insane or is he more alert to the dangers of the world than the common man?

Since her parents death, hobby-detective Trudi lives with her young aunt Julia. When a nearby Turkish restaurant is smashed one night, everybody assumes by default an act of racism. Trudi however did notice a strange guest named Mangold there the day before. Also the caretaker seems very keen on getting the restaurant out of the building. The police and host Kemal don't seem particularly interested in investigating the event, so Trudi starts her own investigations in the style of Sherlock Holmes, with the help of her friend Tom and runaway Rollo.