Thomas (Thomas Mann) is having his birthday, and his two good friends at school, Costa (Oliver Cooper) and JB (Jonathan Daniel Brown), plan to organize the craziest party for him to get rid of their loser status. While Thomas' parents are away for the weekend, the three begin to prepare. They invite all the high school classmates they can get in touch with, buy alcohol with fake IDs, and get ecstasy. At night, the three people who were originally worried that no one would come were overjoyed to see the waves of people, especially among them, there were many strange beauties, which made the three more hormonal. More and more people came, the party became more and more crazy, and neighbors kept complaining, unable to stop people from going upstairs and entering their father's study... Thomas felt more and more uneasy, but Costa kept encouraging him to enjoy the madness. With nearly two thousand people gathering, the situation was no longer under the control of the three teenagers...