What, specifically, are you looking for?
It sounds like you have a rough storyboard idea, but no mention on if you have all the parts (beginning, middle, climax, resolution)?
- Are you wanting someone to go through once or work with you until the project is finished?
- Are you wanting that same person to also work as a line editor and fine tune punctuation, spell-checks? Or are you wanting a content editor?
- What's the timeline for the job and project?
- Four pages is extremely vague. What is the word count you currently have? (I'm guessing at least 1k~2k)
From your statement it sounds like you just need someone to read it and say "expand on this, this this, you can lose this, expand this"? If that's the case, it's a toss-up between a Beta Reader and a Content Editor.