 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.