To be raised as a kid with no parents would be rough, but what happens when you have a single parent and she happens to be a complete sociopath?
Mother answers that question in a movie that is somehow both immensely watchable and immensely hard to watch. Japanese director Tasushi Omori really explores the darkness of humanity and shines a light on a person who has no business being a parent.
Mother covers about 10 years of her son's life and shows how her abuse helps pull him into her madness and makes him a culprit.
Basically just imagine We Need to Talk About Kevin, but instead of the son being the insane one, it's the mother.