In a world run by machines, a timid young woman – holding a vital secret – must regain her ability to speak before everything she loves is destroyed.

I think this has great potential. What kind of machines? Is it only machines in the story? or do humans still have control? What is the secret she holds?

I went ahead and resubmitted the revision. Find it here:
https://loglines.org/when-a-young-woman-foresees-her-communitys-catastrophic-doom-during-an-accident-that-renders-her-without-speech-she-must-choose-between-keeping-a-solemn-promise-and-telling-the-life-saving/

I went ahead and resubmitted the revision. Find it here:
https://staging.loglineit.com/when-a-young-woman-foresees-her-communitys-catastrophic-doom-during-an-accident-that-renders-her-without-speech-she-must-choose-between-keeping-a-solemn-promise-and-telling-the-life-saving/

"In a world run by machines"

Does this mean, the world is fully automated, Cars, restaurants, manufacturing, everything is run by machine?

Or does it mean, Machines are the masters and humans are the slaves...

Also, this girl has a secret and needs to regain her voice. Why doesn't she write down the secret and show somebody.

Agreed with the above comments there is too many vague descriptions for the logline to paint a clear picture.

For example, why now? Why didn't she need to save everything she loves a year ago? Is there a deadline by which she has to save everything by? What event started off the story and gave her a compelling motivation? Lastly every thing she loves is too vague, what specifically does she need to save? A loved one? Her family? Her pets? etc..

Hope this helps.

I appreciate your feedback! More detail, comin' up.