The 4P's in producing a film,to start with you have to have a protagonist.This is the main character in the film and the story revolves around what problems he is facing or the situation he is in.
Secondly is the plot;this is the actual story  about what the protagonist is trying to achieve,against some forces which can be termed the antagonist.This can be a person or a situation.
Thirdly there is the problem,this gives in more detail what complications the protagonist is facing and lastly is the Premise.This is the silent message that the script writer is trying to put across.Please fill free to add or take away from my notes to make them better.