When Emma Harte, a pretty, late blooming, slightly nerdy teen girl who has never shared her first kiss, decides to help her not-brother James, the ultimate womanizer, and the most popular boy in school, with his huge 'party of the year' scheme, she finds herself trying to keep their relationship in tact. James' dad got married to Emma's mon when they were really young, and they all have lived under the same roof since. But, a couple years after James' dad passed away, James was sent off to another school, St. Bernard High for throwing his principles chair into the school pool. Now he's being forced to go back to Emma's school, Santiago High. He asks her and her friends to sell their merchandise from their school business, which is off the charts cool. James promises her more business in exchange for selling a bunch at his party to all of his friends, including people from his old school.
The Dream Team, which is made up of Caleb, Emma's best friend and James' younger brother, and Sophia, both Caleb's and Emma's best friend from the 3rd grade. They all initially agree to help James, and also want to make some good money from the party. But, there's one girl who wants to see it all burn up in flames. Sammi, a mean, catty, popular girl who has the hots for James, tries everything in her power to ruin Emma. After a bunch of run ins with the both of them, Sammi makes up a rumor about James, insinuating it was Emma who started it. James watches Emma embarrass herself on multiple different occasions, And still wont explain why he is upset with her. But, after Sammi gets a football player to put a cockroach in Emma's hair in class, Emma runs out to leave. She then runs into James, who Offers to give her a ride home. He then tells her he fiund out it was Sammi who started the rumor. And to make it up to her, he brings her to see her favorite series, 'Raven-Man' at the Drive-in theatre.
Senior year of high school is all about living it up and making the most of your final year before stepping into the real world. For Roxie Smith, she just wants to get through the school year. She doesn't mind quietly doing her homework and begin prep for college. High school hasn't been her favorite fun time and she can't wait for summer to roll around again.
For her friends and Brad, her boyfriend, however, they really want to leave the school with a bang. They want to be a legendary senior class and they want to go down in history for all the classes after them.
Brad comes up with an elaborate plan to take over the school and teachers disguised as the annual senior prank. Roxie knows it's a bad idea. She knows it'll get out of hand. Her friends shun her when she decides to take no part in the take over. None of the teachers believe her when she tries to warn them and she has the whole school against her.
Some say senior year is the best. For Roxie, it's going to be a long one.