After returning to Los Angeles from a group therapy session, documentary filmmaker Bob Sanders and his wife, Carol, find themselves becoming vigilante couples counselors, offering unsolicited advice to their best friends, Ted and Alice Henderson. Not wanting to be rude, the Hendersons play along, but some latent sexual tension among the four soon comes bubbling to the surface, and long-buried desires don't stay buried for long.
An aspiring music journalist lands her dream job and is about to move to San Francisco when her boyfriend of nine years decides to call it quits. To nurse her broken heart, she and her two best friends spend one outrageous last adventure in New York City.
On the eve of a Kate's 30th birthday, she agrees to let her two lifelong friends, Evie and Charlie, throw her a party. But what's supposed to be a simple celebration becomes a wild who's who of past and present, and things quickly spiral out of control.