A plot to assassinate Cesare Borgia misfires when a woman involved falls in love with him. Cameron Mitchell, Gloria Milland, Conrado Sanmartin, Franco Fantasia, Dina de Santis. Heavy., In this historical costume drama, Caterina Sforza uses beautiful women as assassins in order to poison Cesare Borgia. The film deals more with Borgia’s reputation as a playboy than with his military victories, and the accent is on Sforza’s jealousy and hatred.