Mike and Susanne are a loving couple who keep afloat through petty crime. When they are pursued by the police following a robbery at a jewelry store, they seek refuge in a slaughterhouse.
Because her husband, crime novel author Bert, prefers to spend the evenings with milieu and girl studies in the pubs, Conny files for divorce and moves with the two children from Berlin to Munich. There, she mistakes the new teacher of her daughter with the renovating carpenter, which is quite alright with the teacher as this gives him plenty of opportunity to enjoy Conny’s company. Meanwhile, however, Bert as well has started to understand how good it is to have a cosy home. He comes to Munich in order to win Conny back.
Tommy loses his job as a make-up artist at Bayerischer Rundfunk after fogging an announcer with hairspray and then insulting her; Mike is dumped by his girlfriend because, on the one hand, he only cares about his music and, on the other hand, he is financially stranded. So they both need money and decide to become detectives. On behalf of a rich industrialist, they are to shadow his wife and take photos of her cheating. So Mike and Tommy travel to Bad Spänzer, where the lady is staying. But she is as faithful as gold, so Mike, disguised as a Prussian, makes advances to her so that Tommy can take the required photos. But Tommy soon has to slip into a costume, too: Since Tommy looks deceptively similar to an Arab sheik, he is hired by the sheik's secret service to double him. What Tommy doesn't know: assassins want to kill the sheikh at all costs.
