This is a very good horror about a man who loses it from the knowledge of what went down in the military-sponsored brothels the Japanese army forced the local women into during WWII ala The Pawnbroker. They were raped to death; and though he saves one he is unable to save her twin and she leaves a curse on him. This is a thoroughly modern horror in that one can't really tell if he loses his mind or if he's cursed.
Review of The Sleep Curse
