Kian Devine proposes creating a psychological horror film trailer and marketing materials for a movie exploring isolation, inner turmoil, and mental health during a pandemic lockdown. The film will focus on a single protagonist and his deteriorating mental state as he battles his inner thoughts alone in his home. Devine will conduct research on successful psychological films and apply techniques like establishing tone and translating emotions to viewers' perspectives. He will spend time on pre-production, production of the trailer and marketing assets, evaluation of his work and skills, and presentation of the final project.