The document discusses using enigmas and mysteries in films to engage audiences. It provides examples from the movie "Gone Girl" where the main character is kidnapped but escapes, leaving the audience wondering who the perpetrator is and their motives. This approach inspires using a similar plot in the author's trailer where the main character is kidnapped by an unknown perpetrator to keep the audience guessing about their identity and reasons. It outlines several enigmas or mysteries that could be used, such as who kidnapped the main character, why they did it, whether she knew them, how she escaped, why she wasn't hurt, how her boyfriend found her, and why a gift from her was left at the scene.