Uncle Klaus has invited Marianne, Petra, Hans-Georg, Esther, and Alexander to spend a few quiet days in the Ore Mountains. However, that doesn't happen. Shortly after their arrival in Deutschneudorf, the five siblings hear about the long-lost Amber Room: the eighth wonder of the world! Alexander and Hans-Georg sense an exciting adventure. The sisters are not thrilled. But whether they embark on the search for the Amber Room or not, they can't shake the feeling of being unwelcome. A motorcycle gang is shadowing them. Suddenly, the five siblings have pressing questions - and the prospects for solving the mystery look bleak.