Batgirl Begins (2015)

A fan-film loosely based on Batgirl by DC Comics; the story was conceived of by then-5-year-old Arianna Kristina Andrews. A family comes home to find their house has been broken into, their possessions stolen -- including the author-father's latest book. But the criminals, who are systematically stealing from all the houses in the Home Owners Association, have no idea just who their latest victim really is.