The document analyzes film narrative theories and applies them to the film "Before I Go to Sleep." It summarizes Todorov's, Propp's, and Levi-Strauss's theories and identifies the narrative structures they see in the film. The document concludes that Todorov's theory of narrative equilibrium, disruption, recognition, repair, and return to equilibrium best describes the plot of the film. It also discusses potential applications of Propp's character archetypes to the author's own thriller film.