Samuela despairs of her lack of breakthrough as an author. When she is abandoned by her boyfriend, she secretly travels with her brother to the family holiday home in Lanzarote, where she wants to work on her novel. But instead of the peace she hoped for, she finds her father there, who occupies the house after the divorce. When her mother also shows up, the chaos is perfect.
GDR, January 1990. After his ouster and the fall of the wall, dictator Erich Honecker and his wife Margot find themselves virtually homeless. Only Protestant pastor Uwe Holmer and his family, who, like many others, have suffered under his tyrannical regime, offer them refuge.
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!