Jon Heder is the eponymous high school student who lives with his brother "Kip" (Aaron Ruell) at the home of his grandmother (Sandy Martin). Now she's a bit of a game girl and manages to come off her buggy whilst racing in the sand dunes and so their womanising tupperware salesman uncle "Rico" (Jon Gries) turns up to provide them with steak and keep them in check. "Kip" has fallen madly in love with a girl he met on the internet; his sibling - a bit of a geeky loner - alights on school newbie "Pedro" (Efren Ramirez) whom he decides to help defeat the school sweetheart "Summer" (Haylie Duff) to ...