Noah (Ed Helms) and his wife, Alice (Lake Bell), Harvey (Paul Reiser) and his wife, Cybil (Mary Steenburgen), are stuck in a rut. They're in an awkward stage of marriage. Alice's sister, Fanny (Amber Heard) and her guy, Zander (Wyatt Cenac), are weird, but they seem to have it together. That is, until filmmaker Vivian Prudeck (Dolly Wells) gets involved in their lives.
She's working on a new film that proposes loves is not sustainable and therefore, marriage is dead. Although Fanny and Zander seem to be the most together of the three couples, they're harmed the most by Vivian's interference. The three couples decide to get Vivian back for trying to mess up their lives.