Meier Müller Schmidt is the name on the doorbell of the men's shared apartment in Kreuzberg where Julian Meier, Kasimir Müller and Max Schmidt live. So far, the trio has managed wonderfully well on their own, but then Eva suddenly appears at the front door. She offers bagged soups for sale, but Julian's heart immediately flies to her instead. It doesn't take long before it turns out that Eva has only turned up at their house to meet her unknown half-brother - who, unfortunately, is called Julian. Nevertheless, no one objects when the budding actress moves into their shared apartment as the fourth member. Kasimier is also caught in love - but he ends up in bed with a man and when he breaks off contact shortly afterwards, Kasi suddenly panics that he may have caught HIV. Shortly thereafter, he disappears without a trace and Max reads about a new drug that can drain the memory.