As always, it’s a cheerful chaos that rules in the Herrlich household… until some really bad news shakes the entire family to their core. Stefan’s mother, Marlies, has died suddenly from cardiac failure.
While Stefan’s grumpy dad Hubert thinks he can keep everything in his life going just as it did before his wife’s tragic death, Ines, Stefan’s wife, has her doubts. She knows he’s becoming more and more forgetful and that he’s not quite as steady on his legs as he used to be.
But Stefan and Ines already have their hands full trying to cope with the growing pains of their young teenage daughter Ada, their son Timmy who’s having major trouble at school and the barely five year-old Leni, who can hardly wait to start school. When Hubert accidentally causes a fire that renders his house unliveable, it’s pretty clear that the situation needs to change.
Hubert, who is just as proud as he is stubborn, immediately decides to move into a retirement home. Ines, though, won’t stand for that and insists that Hubert moves into the Herrlich household. But Hubert is not what you’d call a team player.
He’s not used to dealing with other people’s peculiarities and much less with helping around the house. Even worse for the Herrlich household, the inflexible old man has some pretty strong and outdated views on bringing up children.
Inevitably, Hubert’s stubborn interference soon starts making the family’s life miserable. Still, even he soon realizes how poorly he’s fitting in, so to avoid causing any further trouble he moves into the retirement home, fully prepared to accept the consequences.
However, it’s not long before the entire family realizes just how used to the cranky old man they’ve become, and as well, just how much they actually miss him…