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In this children's film, Uncle Georg (Otto Brandenburg) is the kind of relation who brings enjoyment to youngsters and gray hair to their parents, and at the moment he has a scheme to make some fast money by kidnapping the child of a wealthy family. His niece and two nephews are brought into this definitely off-the-wall plan but Uncle Georg's madcap methodology is constantly, and accidentally, messed up by the youngest of the three siblings. Worse yet, a notebook that has some incriminating evidence on the kidnap plan is in the house of the victim and now the three children must retrieve the notebook before Uncle Georg really gets in trouble. So his erstwhile helpers join a party going on at the mansion, overeating in the process and taking non-gastrointestinal risks as well, in order to spirit the notebook away. Later on, there is wild chase scene -- though after all is said and done, it seems a pretty safe bet that Uncle Georg will get off the hook, the children will get home with their reputations intact, and the kidnapping will never have the slightest chance of materializing.