Horrid Henry's gonna be a rockstar, and no-one's going to stop him, except maybe Moody Margaret, who's up to her usual tricks.
Henry is forced to be a pageboy at his cousin, Polly's wedding. However, he soon causes the wedding to turn into an unanticipated disaster.
Henry begs Dad for a new mobile phone, while Peter's DJ gift from Great-Aunt Greta has gone too far.