La Loca translates to Mad Woman, a harsh but accurate description of the heroine, played by Libertad Lamarque. Outwardly a kindly philanthropist, the woman is, in private, dangerously close to insanity. When she finally does go over the edge, all of her previous good works are forgotten by the public, and she is treated--or mistreated--like any other mental patient. La Loca is all the more powerful when one realizes that its star, Libertad Lamarque, was heretofore best known for her work in lighthearted musical comedies. Director Miguel Zacarias avoids sensationalism throughout, unfolding his tragic tale in calm, matter-of-fact fashion.