Greta is a bright girl who immediately realizes that the dementia ward in an old people's home is not the right place for her friend, 79-year-old Miss Luise! Without further ado, Greta decides to kidnap her and take a trip together to Luise's childhood holiday home in the lady's dusty vintage car. On the way, the two pick up the young street musician Sam and the abandoned mongrel dog Moses. This outwardly very different quartet complement each other perfectly and spend 14 days peppered with lively adventures full of wit and verve. But the trip is always on the verge of coming to an end - Luise's bathrobe is too conspicuous, the travel fund is getting emptier and emptier, and when a police check is happily overcome, the gearbox, which is getting old, also gives in.