I remember when I was around 5-6 I saw a unicorn movie. There was a unicorn and I think people couldn't see the horn. And one day someone captured her and put a fake horn on her and put her in a cage for people to gawk at.

The other part I remember is she gets turned into a human and some guy looks at her and wonders aloud why he can't see himself in her eyes.

Anyone have any ideas?