I remember that I was focusing on a small child. They were breaking into a mansion, like a little assassin. Very quiet and very stealthy. There was a ghost horse. Black, gold eyes, had reins, and kinda wispy. It would protect the child and warn them of danger. The child was caught by a cowboy that looked like Karl Urban and the horse killed him. I don't remember how, but it was a bit extreme. The child escapes and leaves with a bag of loot. The horse follows them.