Shelley Darlington (Anna Faris) has lived at the Playboy mansion for the last nine years. She is Hef’s favorite and acts like a den mother to the other girls. On her birthday, she is unceremoniously evicted from Hef’s pad for ‘being too old.’ With nowhere to go, fate delivers her to the sorority girls from Zeta Alpha Zeta. Unless they can sign a new pledge class, the seven socially clueless women will lose their house to the scheming girls of Phi Iota Mu. In order to accomplish their goal, they need Shelley to teach them the ways of makeup and men; at the same time, Shelley needs some of what the Zetas have – a sense of individuality. The combination leads all the girls to learn how to stop pretending and start being themselves.