At a suburban high school graduation party, Preston Meyers seizes his last chance to declare his long-held love for the most popular girl in school, Amanda Beckett, who has recently broken up with her jock boyfriend, Mike Dexter. Preston believes he is destined to be with Amanda and carries a heartfelt letter he has written for her. Meanwhile, his best friend Denise finds herself reconnecting with old acquaintances at the party, and geeky outcast William Lichter plans an elaborate scheme to humiliate Mike as revenge for years of bullying.

As the party unfolds, different characters experience moments of self-discovery and unexpected encounters. The nerd trio led by William gets sidetracked by the allure of newfound popularity. Kenny Fisher, a wannabe ladies' man, faces awkward situations as he hopes to lose his virginity. Amanda navigates her newfound single status and the attention that comes with it, questioning her past relationships and future choices. The intertwining stories of love, revenge, identity, and friendship create a chaotic yet memorable night for the graduating seniors, leaving an indelible mark on each of their lives.