Five high school students from different walks of life endure a Saturday detention under a power-hungry principal. The disparate group includes rebel John, princess Claire, outcast Allison, brainy Brian and Andrew, the jock. Each has a chance to tell his or her story, making the others see them a little differently -- and when the day ends, they question whether school will ever be the same.

‘…the definitive '80s teen movie.’ Empire Magazine

Mae pum myfyriwr ysgol uwchradd o gefndiroedd gwahanol yn cael eu cadw yn yr ysgol ar ddydd Sadwrn gan deyrn o bennaeth. Mae'r grŵp amrywiol yn cynnwys y rebel John, y dywysoges Claire, Allison yr alltud, Brian peniog ac Andrew, y joc. Mae gan bob un gyfle i adrodd ei stori, gan wneud i'r lleill eu gweld ychydig yn wahanol – a phan ddaw'r diwrnod i ben, maen nhw'n amau a fydd yr ysgol fyth yr un fath.