Complex sentence: Stylistically different from the first film, the story revolves around a group of people fascinated by the mythology surrounding "The Blair Witch Project" movie and go into the Black Hills where the film was shot and documents their subsequent psychological unraveling.
Split into simpler sentences: Stylistically different from the first film, the story revolves around a group of people fascinated by the mythology surrounding "The Blair Witch Project" film. They go into the Black Hills where the original film was shot, and the new film documents their subsequent psychological unraveling.