The successor to the best-selling book "Dein Spiegel" by YouTuber IsyCheesy!

For Isy and her friends Lia and Aiden, today is a very special day: as the first visitors, they get to explore the remains of an ancient city discovered in a gigantic cave with their school class. Even little pig Schinken has received special permission to join them. The friends are fascinated as they look around the ruins – until Isy starts to feel something strange.

What if the abandoned city isn’t so abandoned after all?

Out of the corner of her eye, Isy seems to notice movements, fleeting shadows... and was that just a whisper? Isy is determined to find out what is really happening in the city. Together with Lia, Aiden, and Schinken, she sneaks back into the cave at night. At first, everything looks unchanged. But that is about to change quickly...