On the eve of their high-school graduation, two academic superstars and best friends realize they should have worked less and played more. Determined not to fall short of their peers, the girls try to cram four years of fun into one night.

In 2002, an artistically inclined 17-year-old girl comes of age in Sacramento, California.

Mac and Kelly are trying to sell their home with the arrival of another baby. A couple, Eric and Jessica Baiers are looking to buy; the realtor tells Mac and Kelly that their house is in escrow for 30 days. Meanwhile, Mac's friend, Jimmy, and his once-again wife Paula are also expecting a baby. At the Phi Lambda sorority, Shelby, a freshman, learns that sororities are not allowed to host parties, and can only attend frat parties. Shelby goes to a frat party and meets two other freshmen, Beth and Nora. They are disgusted by the sexist and perverse nature of the party and leave. Bonding over their dissatisfaction, the trio decides to set up a new sorority, Kappa Nu, to host their own parties.