The document discusses 3 initial ideas for a film trailer: 1. An ordinary girl who discovers a mysterious dairy from her grandmother and starts having strange thoughts. This is a sociological thriller targeted at ages 15+. 2. Two girls go into space for 2 days and discover an alien plant but get kidnapped by a strange alien. Their parents worry. This is a sci-fi thriller targeted at ages 15+. 3. A strange girl lives in a jungle and kills animals there but goes to school by bus. This is an action thriller targeted at ages 15+. The document then analyzes the pros and cons of each idea, ultimately selecting the first idea for the trailer due to its more achievable