I would refocus the logline around the immediate and ?central objective problem that drives the story, the heist. ?The inciting incident is the foster kid’s discovery of the plan. ? Is there a sense of urgency, a ticking clock, limited time to do something about it? ?And what?

Why doesn’t he just go to the cops, tip them off? ? Or simply run away, have himself get caught by the cops and be returned to the safety of the state ward, ?farmed out to someone else? ?I mean, there just seems to be so many other solutions to his problem of not being involved in the heist — and faster — than searching for his father.

And, if the foster parents are going to use him for the heist, wouldn’t they keep him under control, confine him to the premises? ? How is he going to be able to search for his father when they won’t let him out of their sight? ? And while it’s plausible he could stumble upon the heist, why would the foster parents trust him — an outsider to the family — to be a reliable accessory ?to their heist, even under coercion?

I think there’s a potentially good story here, but the concept needs polishing.