Not one of the better films I've seen. In fact let me change that statement, I meant to say this has to be one of the worst I've seen.
The basic problem was the apparent lack of storyline. If I understood it correctly (and I might not have done) then a very large quantity of gold was hijacked from a train in a tunnel, and then disappeared without trace. It must've been difficult for the investigators figuring out which direction the hijackers went off in - with a choice of forward or backward on the train line in/out of the tunnel I guess the odds were overwhelming that the direction the gold took wasn't obvious.
If you are having trouble sleeping then this is the movie for you. The word "sucks" comes to mind, but to be honest I think someone must've plugged the colonic irrigation machine into a high voltage power line when they were putting this movie together.