Fact1: high school students In throw party for friend Pasadena, Fact2: Thomas 's parents go for weekend leaving, Fact3: best friend has crush on Thomas, Fact4: Thomas limit party to backyard and poolhouse with house guarded by Everett and Tyler, Fact5: party moves beyond control and into house
Output: In Pasadena, high school students Costa and J.B. plan to throw a party for their friend Thomass birthday, aiming to increase their popularity. Thomass parents go away for the weekend, leaving him alone in the house, but warn him not to have too many people over, and not to drive his fathers Mercedes. Thomas is reluctant to have the party at his house, but Costa continues with his plan. Costa hires AV student Dax to chronicle the nights events. While Costa, J.B., and Dax advertise the party throughout the school, Thomas himself invites Alexis, the hottest girl at school, and his best friend Kirby, who has a crush on Thomas. After buying party supplies, the boys go to buy marijuana from drugdealer TRick. While TRick is not looking, Costa steals his lawn gnome to use as a party mascot. As they leave, TRick discovers his gnome stolen and chases after them but they escape in Thomas minivan. As night falls, the partys start time passes but no one turns up and Thomas worries that the party will fail. Suddenly, partygoers arrive enmasse. Thomas intends to limit the party to the backyard and poolhouse with the house guarded by Everett and Tyler, two young security guards hired by Costa. However, more and more people begin to arrive and the party moves beyond their control and into the house. Thomas questions Costa on how he advertised the party, forcing him to confess that he put ads on Craigslist and on a local radio station, worried that no one would attend. Things escalate quickly and the police arrive, responding to a noise complaint. The partygoers remain silent, convincing the officers that the party has already ended. The police leave and the party resumes. TRicks gnome is smashed, revealing that it contains a large amount of ecstasy tablets, which are quickly consumed by the partygoers. Thomas kisses Kirby and reveals that he loves her. Alexis meanwhile flirts with Thomas throughout the night and eventually seduces him. Kirby walks in on the pair as they are about to have sex and leaves the party upset. The noise and chaos of the party, which has now spilled into the surrounding neighborhood, receives televised news coverage with helicopters flying over the house. A dwarf guest drives Thomas dads Mercedes into the pool after being put into an oven by other partygoers. The police return in force but are overwhelmed and repelled by the guests. They decide to let the party end naturally before moving in. TRick arrives armed with a flamethrower in an attempt to reclaim his gnome. He begins setting fire to the trees and cars in search of Costa, forcing the guests to flee and the party to end. The police shoot his flamethrower pack and it explodes. Thomas, Costa, J.B., and Dax flee with the other guests as Thomas house and the rest of the neighborhood is left aflame and the SWAT team moves in to retake the neighborhood. By morning, the boys return to their respective homes to discover what punishment awaits them. After his parents return, Thomass father commends him for managing to throw the party because he thought he was a loser, but he uses Thomass college fund to pay for the damages. At school, the boys are cheered by the students and Thomas reconciles romantically with Kirby. In the epilogue, TRick is recovered alive following the explosion, Thomas is convicted for disturbing the peace, contributing to the delinquency of minors, and inciting a riot, and Costa and J.B. are acquitted; Costa because of his expensive lawyer, and J.B. because his parents convince the court that he is mentally incapable and unfit to stand trial. Costa, however, is currently waiting for the results of three paternity tests. Dax, meanwhile, is under investigation for the disappearance of his parents. In a TV interview with Jillian Reynolds, Costa promises his next party will be even better.