A Spanish thriller from 1999, the Nameless is a slow-moving, moody piece, but the payoff is indeed worth it, in the sense that I haven't quite seen a concept like it (and I'm not sure I'm glad I did!).
Basically, the story is one of a mother who has lost her young daughter, seemingly to an underground ritualistic homicide. She receives a call, years later from a caller claiming to be her daughter. She finds one of the detectives assigned to her daughter's case,and sets out trying to find her daughter. The results are more twisted than she ever could have thought. The performance of her ex-husband (Tristan Ulloa) toward the end is absolutely bone chilling!
Good movie, well acted and DISTURBING. I give it a 6 out of ten. More if not soooo drawn out.