There is a myriad of horror/thriller movies where for whatever reason a group of people enter a former "insane" asylum. Whereupon they are haunted and hunted by the ghosts of the previous patients. This is just another one of those movies. I've just given you the plot of this movie and many others. Nothing really different, except a few we'll known names are attached to the project. One suspects these movies are cheap to make. Derelict buildings used always in darkness. If you are into the genre by all means watch it. Otherwise only give a go if not much else is happening.