Jack the Ripper is the most infamous killer of all time even though his victims probably only numbered five. What could compel someone to commit such heinous crimes? The answer is revealed when it is discovered that an actual evil force caused the deaths and used a host body. Now in the present the deaths begin anew and this time, it doesn't intend to stop at five. A crime team attempts to stop it and soon they become aware that one of its members may be succumbing to the very force they're trying to stop.