It's the last Monday in September. For sophomore girls at Moreland High, it's the most important day of their lives. They rush to their lockers and hope to find that one-of-a-kind invitation to the Sapphires Social Club. For the lucky few who are chosen, there is the promise of popularity and high school fame if they complete initiation. Queenie, a cheerleader with a basketball star boyfriend, believes that being a Sapphire is her destiny. Taylor, a tennis player, is a reluctant participant in a bet that she can't complete initiation. Chanel, an honor student from a low-income neighborhood, is looking to secure her status among Moreland's rich kids. Anna Maria, who is struggling to lose weight, sees the Sapphires as a way for her peers to accept her. The girls soon discover that the Sapphires Social Club is different from their expectations. Ultimately, they will have to decide if being a Sapphire is worth the total price of admission.