El extraño caso del doctor Fausto (1969)

Dr. Faust, a highly successful scholar, although dissatisfied with his life to the point of being willing to make a pact with the Devil himself if necessary, is observed by unknown creatures from outer space. Suddenly, a strange and beautiful woman appears in his life. But her abnormal behavior will make Dr. Faust's world slide, slowly and inexorably, towards madness.