The phone in your detective agency is finally ringing again after a long, long time. At the other end of the line: Mr. Schmidt. He tells you that his father - a retired employee of the Düsseldorf City Museum - died a few days ago at the blessed age of well over 80 years.

When clearing out the apartment, he and his sister found an old, dusty - and well-locked - suitcase, well hidden behind a double wall unit. Mr. Schmidt tells you that his father would often have talked about a big secret ... but never wanted to reveal more. Now the caller wants to hire you as an experienced investigator to finally solve the mystery.

He promises you that he will bring the suitcase - and that his sister or he will accompany and support you throughout the investigation. You can also negotiate two drinks (soft drink or Altbier) and delicious brewery snacks. Now it's up to you: Do you accept the assignment??? This tour is about three kilometers long, leads through the old town and Carlstadt, and will be accompanied by a guide / live actor the whole time. You have to solve riddles to get to the next station. You will find the riddles inside the suitcase and at several locations. The aim is to track down the secret of Mr. Schmidt's father.