A middle-aged woman who was estranged from her father at age ten when he was taken to prison, journeys back through his life in an attempt to piece together the puzzle of the man she never really knew.

I suggest the logline, and perhaps the concept, may need to be rethought. As as presented, the story seems to be 1] backward-looking (only) 2] with no apparent antagonist, and 3] no well-defined stakes.

As a general rule, plots are forward looking, not backward looking. In stories where characters are looking backward in time they are doing so in order to solve an urgent problem in the present or near future.

Stakes: What difference will it make in her present and future life if she does piece together the puzzle? Conversely, what does she stand to lose in the present and future if she fails? Why should the audience worry what the consequences will be if she fails?

What’s the urgency? Other than curiosity why MUST she know about him NOW?