The Breeder (2011)

Amy and Sophie, two American aid workers, find themselves lost in the enigmatic Caucasus Mountains. Their trek leads them to a hidden location, entirely isolated from civilization, devoid of communication or roads. In this ancient realm, a menacing figure known as The Breeder instills terror in the locals. Targeting young women, he preys on those he deems sinful, including Sophie. After witnessing her swim in a secluded lake, he violently captures her and takes her to a clandestine breeding facility, a former Soviet lab shrouded in dark secrets.