It's an exercise in storytelling that evolves quickly into a valuable lesson for anyone who purports to be a feminist, an ally or a film and television lover. You'll never watch either the same way again.

It really is a very important film.

If anyone needs convincing at this late date that gender inequality both in front of and behind the camera is the norm in Hollywood, "This Changes Everything" will get the job done.

In its technical simplicity, This Changes Everything raises the problem of gender injustice rooted in the past and all-embracing the contemporary age.