Darius Caunes is a modest printer flanked by a cantankerous spouse ;he finally does away with her and becomes friends with the lieutenant in charge of the investigation ...who does not suspect him at all. Non content with having done such an awful crime,he is also a counterfeiter -which is easy in his printing house .But one blimp is enough to bring everything grinding to a halt !His secretary ,pretty Rose, gives some of these forged banknotes to a buck she is in love with.