You’ve just arrived in Berlin, full of excitement to begin your studies - and your new life. But on your very first morning, a mysterious note slips under your dorm room door: “Head to St. Thomas Church asap.” No name. No explanation. Just a location. 

Curiosity gets the better of you, and you step into the streets of Kreuzberg, a district where history hums beneath graffiti walls and every alley has a story. 

As you follow real clues through iconic sites and hidden corners, a secret network begins to reveal itself. Who sent the note? And why you? Walk, explore, and puzzle your way through Berlin’s past and present in this thrilling quest—perfect for friends, family, and curious minds alike. The city is waiting.