检察官Etzel发现，他的父亲仅凭推定就对一名男子Leonardo Maurizius判刑。然后，他以追查案件的来源来揭露真相为荣。

If any one man is responsible for the rejuvenation of the postwar Swiss film industry, that man was director Leopold Lindtberg. Matto Regiert (Madness Rules) was co-adapted for the screen by Lindtberg from a novel by Friedrich Glauser. Heinrich Gretler stars as Police Constable Studer, the hero of several of Glauser's most popular works. This time, Studer must solve the murder of the director of an insane asylum -- and it's not (surprise, surprise) the most likely suspect, manic-depressive patient Herbert Caplaun. For box-office purposes, Matto Regiert stresses a romantic subplot involving Caplaun and nurse Irma Wasem.

A policeman is not convinced that the prime suspect in a murder case is realty guilty and so decides to reinvestigate the case, despite the lack of co-operation from locals.

At the end of the Second World War, orphans of various nationalities come together at the Pestalozzi Children's Village in Trogen. When the order arrives from Poland that the Polish children must return to their country, it comes as a shock to 13-year-old Andrzey: he doesn't want to leave Anja, for whom he has developed a strong affection. The two children decide to flee and go into hiding...