John August has a great article on his website about the idea of writing a script from theme.
The Un-Rules of Screenwriting: Kirsten Smith’s List
We at LA Screenwriter have found that novice screenwriters often struggle with the problem of "the rules," erring either on the side of formula or of complete disregard for structure. With that in mind, we've asked working writers what rules--either flexible or inflexible--guide their writing.