The spine of the DVD says "Horror" on it. Totally inaccurate. Monolith is one part survival thriller (low on thrills), and one part science fiction.
Home-wrecking former pop sensation mom is worried her guy is cheating on her, so she drives his armored ultra-high tech SUV with toddler in tow to pay him a visit. She gets re-routed by her "smart" vehicle onto a shortcut... through the desert. She hits a deer (or at least something with antlers), gets out to check on it, and, well, her little boy, playing with her cell phone, puts the vehicle into lockdown mode, trapping him inside. That is some irresponsible s#!t.
I liked the idea of this car, and where car technology is taking us. For the bulk of this film, anyhow, it seems like a feasible place in the future to go. A vehicle that takes safety to the nth degree, and you can have a conversation with it! (complete with A. I. communication barriers).
Unfortunately, not much happens in this film. There is a character set up where you kind of grow to dislike bad mom, but at the same time feel a little bad for her. Then she gets locked out, and spends the rest of the movie making futile attempts to get back in. I actually thought the lead actress (Katrina Bowden) in this was good. She doesn't play it overly dramatic, and I think ultimately grew as a character to not take her son for granted. Then there's this total cop-out of a resolution, that I think is best left undiscussed. It does raise a number of unanswered questions.
I am a fan of movies with a very small cast, limited locations, isolation. It held my interest enough to give it 5 stars.