A bitter fight for power and control over the underground music market, leaves two men exposed to an unlikely aggressive takeover.

That was actually a big help and I got it loud and clear. Hopefully my next attempt will be closer.

I personally like movies about the music industry as they have much scope for humor and comic relief whilst playing with the mystified "rock stars" we all learn to admire in our youth.

Not sure what "...the underground music market..." is perhaps better to choose a market most people will be able to understand and relate to easier.

Also "A bitter fight for power and control..." sounds vague because it can be interpreted in many different ways not to forget that the logline didn't specify an MC.

If this is a dual protagonist plot then there is an added complication already from the fact that it is not about one MC. With the added vague nature of the above the logline doesn't describe enough for the reader to have a clear understanding of the story.

A something happens to a main character that must achieve a goal despite a clear obstacle to save the day.

Hope this helps.