A new neighbor for the enterprising siblings Lena and Willi: Tina and Konrad move into the house across the street. And surprise, surprise: the four children are only separated by a single letter - at least as far as their last names are concerned. That's fate, all right. So the four HeRRmanns just have to do something together!
For example, chasing pickpockets. They're making the neighborhood unsafe right now. At first, the young detectives are only after the reward, but then they are drawn deep into the exciting case. And they realize that some things are not as clear and simple as they seem at first glance...
Recommended for readers 8 years and older.