As a true Berliner and thoroughbred service technician, Viktor Kudinski (Moritz Bleibtreu) is always right - at least if he has his way. But Mika (Enzo Brumm), his son from a divorced marriage and new assistant, sees things differently. The philosophy student has an opinion on everything, but also extremely little technical knowledge, at least. When it comes to the delivery and installation of washing machines, coffee machines or complicated sound systems, Mika can therefore score points above all in his dealings with the sometimes bizarre customers. In this way, the estranged father-son duo gets on with their daily work and, incidentally, also gets to know each other for the first time ...