Grandma Eusebia absolutely wants to take part in a classic car competition with her car. But Grandma's vehicle loses one part after another along the way. But Eusebia is wildly determined to take part in the competition. Unfortunately, she is not quite as happy with Fix and Foxi's repair skills. Uncle Fax had a yo-yo accident and is suffering from memory loss. And it gets even worse. He thinks he's a toddler and behaves that way. Fix and Foxi and Lupinchen agree - only a radical cure will help. Where does the Alien family prefer to go on vacation? Of course in Fuchsburg. So their UFO ends up in Uncle Fax's garden. Unfortunately, the house of Fix and Foxi is not a hotel. Pip and Pep are allowed to take part in the game show "The Great Slime Battle". As a television viewer, they had always wondered why the candidates never win anything. In the TV studio, the twins notice how the moderator cheats with illicit tricks.