A wealthy, possessive husband's investigation reignites his young wife's past love, leading them to plot against him. As obstacles fall away, their passion faces a new test.
In 1951, two years after the “scandal” of the Fiamma che non si spegne, Cottafavi got the opportunity to work on a film with a small production company, Novissima Film. With little means, a number of technical and financial problems and working Sundays with the pieces of film given to him bit by bit, Cottafavi shot Una donna ha ucciso, a minor film that marked his comeback to directing. (Gianni Rondolino)
Roberto Maldi, a young scientist, is trying to find a serum capable of giving courage but he unwittingly invents a serum which transforms any man in a womanizer. His boss scents a good business and wants to produce the serum on industrial basis, but Roberto does not agree.
