After being accused of murder, a naive woman must overcome fear and flee her sheltered world in search of the truth, only to discover she may be the worlds greatest assassin.

I'm not sure i like the description of her character 'naive' I wonder if there is a better way to describe her.
Is she a mother? What's her career? If she were a mum that would be cool. Lots to leave behind and also to fight for!

After being accused of murder, a mother has no choice but to leave behind everything she knows in search of the truth, that she may be the greatest assassin in the world.

A bit long but it makes her sound stronger. Hope this helps x

Intriguing stuff. I'm not sure the overcoming fear bit is actually necessary though, it's a bit vague to me. Why not call her a 'fearful' woman and cover her naiivit? with that as well? Just from this one liner though, I'd watch it!