Grandpa Oskar takes neither the truth nor himself very seriously. The rascal has just been released from prison, where he was serving a sentence for imposture. Since the ex-con needs a place to stay, he quartered himself in the old construction trailer in the farthest corner of the garden of his daughter Tilda, who is still mad at him. The senior soon meets his autistic granddaughter Fanny, whose antics and peculiarities threaten to break the family under. In contrast to the old man, the 8-year-old takes the truth very seriously. In order to gain their trust, Oskar does not introduce himself to the comic-loving girl as the criminal grandpa, who has been missing for years, but as Professor Krypton. For Fanny, who prefers to wear a brightly colored superhero costume and is teased at school for it, the omniscient mentor from the Superman planet comes along just at the right time, because she has a dream: To win the talent competition at school!
The ambitious scientist Franz Walter doesn't hesitate when he is promised a professorship at the university. He immediately accepts, pledges absolute loyalty to the system and agrees to work for the GDR's foreign intelligence service until he can take up his new position. Together with his colleague Dirk, he is sent on foreign assignments to West Germany. Franz soon has to use blackmail to get innocent people to talk. But his superiors go even further: GDR refugees and their relatives are targeted to be psychologically destroyed, forged letters, medical diagnoses, surveillance and wiretapping are on the agenda. However, this is more than Franz can bear: he feels powerless and increasingly isolates himself. When he then decides to steal secret documents for a later defection to the West, this results in an unfortunate chain reaction leading to his arrest and ultimately to his execution...
Klemens Kurz is a family man, a successful meteorologist - and autistic. He has Asperger's Syndrome, which means he takes everything literally, is a logic genius and has a special relationship with his emotions. When he was offered an attractive job for a research project in Svalbard in the Arctic, he quickly told his two teenage kids, Nelli and Carlo, that they were going to the far north. And Grandpa Arthur should come along too. No option for the three, a plan has to be found! In order to dissuade Father Klemens from his plan, the teenagers try to find a wife for him by all means of modern online dating. But as a person with a special relationship to his feelings, this is not an easy endeavor.