Mistress of souls (2007) watch online hight quality video
Since I noticed that a lot of you are into Boundheat productions, here's Mistress of Souls.
The story is that, in a dystopian future, a woman is taken captive by a rich oil producer, who asks her to cooperate and give up the location of her father's book, containing informations about alternative methods of producing electricity. Since she refuses, she meets the same fate as the other slave girls: she is stripped of most of her clothes (only allowed to wear some panties that barely cover anything) and toil in the factories, producing fuel, under the whip of the mistress. In the meantime, other slave girls are used as ponies to carry the mistresses around.