Complex sentence: Believing that Michael is mentally guiding her, she follows these "visions", which lead her down a garbage chute into a labyrinthine series of basement tunnels, where she encounters a young vampire named David, who has been tracking her.
Split into simpler sentences: Believing that Michael is mentally guiding her, she follows these "visions", leading her down a garbage chute into a labyrinthine series of basement tunnels. Here she encounters a young vampire named David, who has been tracking her.