Per its title, Faustina is a distaff variation on the Faust legend. In this case, Mexican film favorite Maria Felix plays a woman who sells her soul to the Devil in exchange for beauty and wisdom. Actually, she bargains with the Devil's assistant (Fernando Gomez), who happens to be one of the woman's former lovers. The would-be demon spends the rest of the film trying to thwart the poor woman's happiness, but eventually declares that he's still in love with her. Not to be taken seriously, Faustina was an enjoyable digression from the usual portentous fare at the 1957 Cannes Film Festival.