Retired Deputy Marshal Sam Brennan is chasing devils. First, the three drunken miners who butchered his wife and stepdaughters. Second, the demon in the bottle that helps numb the pain.

Doe is an Apache. All but enslaved by the gang of scalp hunters who killed her parents, she has become a stranger in a strange land, an outcast from her tribe. After being sold for the second time to a white man, she is beaten and abused on a daily basis. When Sam stumbles into her owner's camp and witnesses a particularly savage beating, he orders the man to stop. The brute draws a gun in response and fires off a shot. It's a fateful decision—and a mistake he will never have the chance to make again.

So begins a partnership that neither Sam nor Doe ever expected, but that will, in the end, define them. Soon, the Utes of the southern Rockies speak of the Many Guns Woman who rides with the Hunter of Men. While in barrooms and saloons from Tombstone to Deadwood, men talk of...