Jason Issacs plays Ol' Bonkers McPhee (or something) a wealthy, land owning preacher who hides a darker side. This is made clear at the start of the film when he stabs someone to death with a massive knife whilst babbling on about The Bible or somesuch.
He also kills the lovely humble farmer chap who lives next door so Mrs Humblechap solves everything with guns.
It is kinda cool to see a woman take the wronged/revenge role that's normally exclusively male, and do a good job of it.
Yeah, if you like westerns, this is definitely one of the better recent ones.