Someone is trying to destroy David Eliot’s school. A year ago, he’d have given anything to see the end of Groosham Grange and its ghastly, monstrous teachers. Now, he’s on track to win the Unholy Grail, a cup of magical power rewarded to the star pupil. But a series of suspicious mishaps has the space between David and the new boy, Vincent King, narrowing at an alarming rate. It seems that someone - or some thing - is trying to stop David from winning - and, worse, threatening Groosham Grange itself!