The document describes the key steps in developing a psychological thriller film. It begins with establishing the main character as a law student who becomes unexpectedly pregnant and faces disapproval from her mother and friend. In an emotionally charged moment after an argument, she is struck by a car and wakes up with amnesia. To regain her memories and understand her current situation, she must find her diary that documents the events leading up to the accident. The opening scene would set up this dilemma for the main character and disruption of her life that drives the narrative.