It was Peter's idea to invite his friends on a joyride on Justus' birthday of all days. In pouring rain, a car breakdown forces the three detectives to seek refuge at the creepy "Blackstone" castle. When lightning knocks out the power line, the three investigators are stuck for good. It soon becomes clear to the three junior detectives that the lord of the castle, Count Gallagher, is a real chess fanatic. But not only that - the old castle makes a spooky impression and then there is Moe, the count's sinister servant. What is it about the chess pieces on the dilapidated, centuries-old chess table that seem to move by themselves, move after move, as if by magic? Is the old building really haunted? The first detective is immediately hooked and senses a new case, only Peter wants to run away. It soon becomes clear to the three investigators that this is about much more than just a game of chess...

"Let's go find some treasure," Tiger and Bear decide when they find a treasure map in an old box. They are joined by Jochen Gummibär the rabbit, who really just wants to make friends. And so begins an exciting adventure. Because it's not just the three of them who want the treasure, but also the resourceful detective Gokatz and the athletic dog "Kurt the Growler," who are always hot on the heels of Tiger, Bear, and Jochen. The hunt leads through ink swamps and ice deserts to an old pirate ship, where the treasure is said to be hidden.

A German communist wrongly accused and sent to a labour camp has to keep her past life hidden for the sake of her and her family’s freedom.