Here's some of the text from Hollywood Theater's website...
"Based on the true story of Thailand's famed transgender kickboxer, Beautiful Boxer is a poignant action drama that punches straight into the heart and mind of a boy who fights like a man so he can become a woman."
I've heard a lot of good things about the movie -- from the queer community and otherwise.
Hollywood Theater: http://www.hollywoodtheatre.org/calendar/beautifulboxer.html
Beautiful Boxer: http://www.beautifulboxer-themovie.com/