In search of Ben, the four friends penetrate further and further into the depths of the underground labyrinth. While Jonas and Leo explore the mysterious corridors, Özzi and Sophie discover a research laboratory. What are the scientists working on here and what do the militant gangsters who have kidnapped Ben here have to do with it? They have only 10 hours left to figure out the secret!
In search of Ben, the four friends penetrate further and further into the depths of the underground labyrinth. While Jonas and Leo explore the mysterious corridors, Özzi and Sophie discover a research laboratory. What are the scientists working on here and what do the militant gangsters who have kidnapped Ben here have to do with it? They have only 10 hours left to figure out the secret!