All normal AboveTopSecret.com Terms & Conditions apply with indicated podcast exceptions.
Explicit language is allowed only if you apply the adult language flag in the upload form.
You must introduce yourself and our sites with your name and our URL within the first 30 seconds of your podcast. For example, "This is the SkepticOverlord coming to you on the BelowTopSecret.com podcast".
Members with more than 200 posts are automatically added to the feed. If you have fewer posts, your submission is reviewed first.
If your podcast features entire music selections, you must either have the rights to distribute the music, or it must be designated podsafe music with appropriate credit added to your podcast thread (created when your podcast is uploaded).
Podcast topics should reflect the board feeds, BTS for general topics, PTS for political commentary, ATSNN for news and current events, and ATS for all AboveTopSecret.com related topics.
Inappropriate content in your podcast (illegal information, discussion of illegal drugs, copyrighted material without permission, attacking members, etc.) will result in immediate termination of your member account without warning.
Source
As long as your story is fictional and does not give real information on illegal activities then I don't see how it will be a problem.
You are welcome to contact one of the moderators if you like your PODCast to be previewed.
Spacedoubt and Spiderj are the PODCast moderators, but I'm sure you'll be able to convince any other moderator to have a quick listen once you've uploaded it. If there are any problems with it they'll handle it from there.
There is additional information in the PODCast forum. Check out the stickied threads.

