Gareth has never been the most popular boy at school, but he's always done all right. Things seem to look up when he befriends Jake, the new boy who's full of exciting tales about film premieres and life in London. But when Gareth is caught doing an impression of Jake's faux cockney accent, things turn very bad. Jake is furious and determined to have his revenge on Gareth, He wants Gareth out of the school and turns all the other kids against him. Gareth has to draw on the memory of his beloved Grandad- and on Grandad's wrestler alter-ego Avenger in order to fight back against Jake. But is Jake really the opponent he seems to be?