A smart, new classy version of an old west historical tale that has never been told, between a well-dressed clean man of small stature and his dirty giant brutal enemy with a personal vendetta; all of which takes place in a large alluring and immaculately clean gambling hall and infamous brothel, where heaven and hell plays out.

how about this "A never before seen historical vendetta between a professional gambler and a corrupt U.S. Marshal plays out inside the walls of the elegant white elephant gambling hall and infamous brothel where heaven and hell merge." .....is that any better?

It's a lot of description, but I don't know what they story is about. What brings them together? What is the personal vendetta. And does it only take place in these two places? The gambling hall and the brothel?