"They Can't Hear You" is about a young woman who's tied to a bed and she has blood on her. She's given two minutes to try and escape. Her sibling is apparently the perpetrator and you don't see his/her face. The woman tied to the bed is clearly suffering and wants to live. The actress playing her gives a great performance. You really feel sorry for this character.
This is a single take film, meaning it was filmed in one long take or at least it looked like it was. I've seen the film twice and I don't remember it having a music score. That's fine with me, though. The film's not extremely violent, but it may still be tough to watch because you're mostly watching a character who's very unhappy and afraid.
I think "They Can't Hear You" is effective. The acting, writing, and cinematography are very good. I liked the ending, but I won't spoil it. I recommend this film to horror fans, but you may want to watch something upbeat afterwards.