In 'A che servono questi quattrini?', a group of characters go to great lengths to acquire money, leading to amusing and unexpected situations. The film explores the effects of the relentless pursuit of wealth and the lessons learned along the way.

Two half brothers, one a pilot, the other a repairman at the plane factory of their father, are in a disagreement due to the envy of the younger brother, son of the first wife of their father. Then both brothers fall in love with the same woman; this causes more conflict between the two, making worse an already tense situation.