Chase

The year is 1869
The place - the wilds of Texas.
Abigail's family are grief stricken when she mysteriously disappears after heading out for a ride, something she has done hundreds of time without incidence.
Chase is a Ranger who has become besotted with the young girl, he's convinced fate has intervened and given him the love of his life and he's got no intention of giving her up.
Who are the people keeping her safe?
And, what is their secret?