If you recall the scene from Indiana Jones and the Raiders of the Lost Ark, if you gazed upon the spirits they would look beautiful, but they would kill you for looking... and Indiana Jones and his crew did not look ... Well, take that scene out of that film, and Wolla!! You have Bird box.

An entity that looks beautiful to look unto, but deadly after looking. So, don't look...

This film has a similar hold... It looks beautiful to look upon, but watch it, and you will kill two hours of your life.

The story drags increasingly, and becomes very mundane in parts. There is no explanation of where this entity comes from, why it is there, and no explanation at the end either. The acting is the only good thing in this movie, every actor plays their character very well, tis my reason for four stars.

If you are wanting to watch a thriller where the story gives a backdrop of "where they came from" then I would recommend Netflix's "The Silence".