en Cuevana 3. Katrin and Dieter really want a new car, but don't have enough money. They therefore decide to host Aunt Mathilde's 60th birthday party and invite all their relatives, including those they haven't been in contact with for years. Because some of them are said to be swimming in money. So Katrin and Dieter hope for some support, but some of it turns out to be just a sham.