Joan Clayton, a successful attorney, prepares to celebrate her 29th birthday (although she claims to be 26 to make her achievements seem more impressive). Toni, Joan's best friend, begins dating Charles, a venture capitalist with a propensity for toe-sucking who dated Joan until he freaked out at the prospect of marriage. Toni tries to hide the truth, but their friend Lynn forces her to confess to Joan. Joan claims she has no problem with Toni bringing Charles to her birthday party; but then brings her friend and colleague, William, to try to make him jealous. Joan is furious to learn that Charles is now interested in settling down, and the evening comes to a screeching halt. Meanwhile, Toni constantly clashes with Maya, Joan's sassy assistant.

After Joan reveals that she hasn't had sex in a year, her friends push her to go for a one-night stand. Joan is reluctant because she generally doesn't sleep with anyone until she has been in a relationship for three months, but tries to make a move on Davis Hamilton, a handsome man who owns the restaurant the girls frequent. She convinces Davis to drive her home and makes a pass at him, only to learn that he is engaged. Although nothing happens between them, Joan tells Toni and Lynn that she slept with him. When the girls blab the news around town, Davis' fiancée dumps him, leaving Joan to struggle for a way to clean up the mess.