The O'Brien family are new in town. An ordinary family - well, almost. Roy O' Brien is a little different - he's a cartoon! Miss Sheringham announces an upcoming test covering all of the school work to date. Roy has never been tested before and is very worried about his chances of success. He finds studying quite tedious so he recruits Tommy to guide him in the ways of revision. Tommy suggests that Roy needs to digest the information - unfortunately, Roy takes this advice literally. Roy quickly swallows all of his schoolbooks and discovers that he can literally eat knowledge. With this new-found power he cannot possibly fail the test - or can he?