This is where things get even more interesting, and a little less strange. It's a reimagining of Robin Hardy's 1973 film, The Wicker Man -- by Robin Hardy. And yes, this is the same film that spawned the 2006 remake by Neil LaBute. Things make a bit more sense with this bit of info, since the original focused on a Scottish island where pagans might be sacrificing a missing girl. I guess after 35 years, he wonders what would happen if Christian cowboys came to visit?!
According to the IMDb summary, this new flick follows "young Christians Beth and Steve, a gospel singer and her boyfriend, [who] leave Texas to preach door-to-door in Scotland. When, after initial abuse, they are welcomed with joy and elation to Tressock, the border fiefdom of Sir Lachlan Morrison, they assume their hosts simply want to hear more about Jesus. How innocent and wrong they are." This is "Cowboys for Christ" -- talk about a misleading title!
An added treat for this flick that shoots this April in Scotland, Christopher Lee (from the original cast) will play Sir Lachlan.