
theme: the basic ideaor the principal object of attention in a discourse or artistic composition
Concept: what exists in the mind as a representation (as of something comprehended) or as a formulation(as of a plan)
Plot: The subject that drives a story with conflict and resolution
ok, so this is just to clear things up, mad a few a little more clear for myself as well.
and by the way a couple of these definitons came from a dictionary and the other from a book on film making.