Sometimes the most effective films have the simplest premise & sometimes that’s all it takes to get hooked. 

What watcher lack in originality; surpasses showing us haunting human emotions, done really simply in a powerhouse believable way. 
You kinda know what’s coming but it doesn’t make it any less terrifying thanks to Maika Monroes emotive facial expressions/performance… I could literally feel her pain, anxiety & fear. 

Put this off for the longest time but glad I finally checked it out.