The Natural Way of Things

Two women awaken from a drugged sleep to find themselves imprisoned in a broken-down property in the middle of a desert. Strangers to each other, they have no idea where they are or how they came to be there with eight other girls, forced to wear strange uniforms, their heads shaved, guarded by two inept yet vicious armed jailers and a 'nurse'. The girls all have something in common, but what is it?