Beset by nightmares, Harry Potter is all too happy to escape his disturbing dreams by attending the Quidditch World Cup. But something sinister ignites the skies at the Quidditch campsite--the Dark Mark, the sign of the evil Lord Voldemort. It's conjured by his followers, the Death Eaters, who haven't dared to appear in public since Voldemort was last seen thirteen years ago--the night he murdered Harry's parents.