Inspired by the case of Austrian Josef Fritzl who locked his daughter Elisabeth in the basement for 24 years.
(A better version of this movie is 2015's Room, which you'll recall introduced most of us to Brie Larson and Jacob Tremblay.)
Anyway, in Girl, Stefanie Scott does a marvelous job, but in the case of Judd Nelson, I'm reminded that sometimes it might be better to make furniture rather than remain an actor if these are the best roles one can find.
Rough, bleak stuff.