This movie gives a lot of room for interpretation which will bother some and please others.

The premise is that of an international phenomenon that causes people to commit suicide upon exposure to whatever lingers outside. Sandra Bullock is convincing as the protagonist whereas the supporting cast is serviceable at best.

Those who have a good imagination and like to theory craft might end up enjoying this one. I found that Bird Box was thin on substance for its run time even though it poses interesting questions from existential and social perspectives.

I haven't read the book on which it is based but it is probably the better medium for this story.