[Update 01/30/16: not the biggest fan of this review. Will try to update it soon. New screenshots also.]
Borrowing portions of films like HIGH TENSION, HOSTEL, HELLBOUND: HELLRAISER 2, ROSEMARY'S BABY, the torture section of Orwell's "Nineteen Eighty-Four" and about 14,000 death metal album covers MARTYRS opens with some ugly chick escaping from a torture dungeon. Placed in an orphanage the ugly chick befriends another girl, Anna, but is haunted by the visions of tortured woman with a metal clamp bolted over her eyes. Stuff happens and years later Anna ends up being held captive by the same perverts that originally kidnapped the ugly chick. The group believes in some kind of transcendental wisdom through systematic torture bullshit. It's all very silly. So anyway the remainder of the film is Anna being tortured nonstop. The first 15 minutes was mysterious, but after the story just falls apart. Honestly, I just say skip it altogether.
On a positive note the special effects were impressive, unfortunately the director decided to film the action scenes in that extreme close-up/ jiggly camera way (think THE BOURNE IDENTITY movies) so at moments it's hard to tell what the fuck is even going on.
If you dig films like this then you'll probably bust a nut for the AUGUST UNDERGROUND'S MORDUM, the Guinea Pig series or even better yet try out an actual good movie about torture: Pasolini's SALO, OR THE 120 DAYS OF SODOM.