The film sets up nicely with a misdialed phone call to a serial killer in progress. I like the idea because it is fresher than the "I know you are alone" call. However, in hind sight, this leads to the most probable ending (which the movie has) because otherwise the motive for the serial killer's pursuit could become far fetched and unlikely.
The acting was okay. The driving force of the film is the desire to find the identity of the serial killer and the motive.
There are definitely many areas for improvement including script, set, special effects and ambiance. There was a somewhat too light tone of acting; maybe if the script demanded it, it would not have seemed noticeable.