The log line, unlike the premise line, does not show the overarching shape of your story, it does not give you the action line of the protagonist, nor does it give you a sense of the big picture. No, the log line’s job is to grab you and get your mind and emotions churning. There are seven components to a high-concept idea:
High level of entertainment value
High degree of originality
High level of uniqueness (different than original)
Highly visual
Possesses a clear emotional focus (root emotion)
Targets a broad, general audience, or a large niche market
Sparks a “what if” question