I gave this a 3 out of a possible 10 stars.
Unless you like wasting your time watching an anorexic actress, in this film it's Carly Pope, behaving like a ditz, don't bother.
Carly Pope plays Sara Novak, a young college student, who becomes intrigued with a game of riddles, that leads her down into subway tunnels underneath the city - a dangerous thing for even a well-armed man to go in alone.
There are various intrigues in the film -- a weirdo classmate who is apparently stalking Sara, a cynical shopkeeper who runs some kind of offbeat hole-in-the-wall establishment that appears to be located in the back alley of a ghetto, a nerdish dim-wit that hangs around the cynic's shop, and a woman named Emily Gray, who is back in prison.
Sara's father is a lawyer who is handling Emily Gray's case.
A few years back, Emily Gray attempted to drown a 12 year old boy. Emily was put in a mental hospital for 5 years, and for some cockeyed reason they let her out again, even though it is obvious she is still dangerously deranged.
The only explanation Emily has ever given for her crime is: I never sinned.
It's all part of the design.
Well, my friend, don't expect to ever get any better explanation than that, because you won't.