Longtime companions Kate (Mamrie Hart), Evie (Grace Helbig), and Charlie (Hannah Hart) find themselves stuck in a rut. Kate is trapped in a mediocre job, spending her evenings either alone or on unsuccessful dates. Evie, married and dealing with dreadful in-laws, drifts from one charitable endeavor to another. Meanwhile, Charlie has the partner of her dreams but struggles to get her business and life in order. As Kate’s 30th birthday approaches, she reluctantly agrees to let Evie and Charlie organize a party for her. What starts as a straightforward celebration quickly turns into a chaotic gathering of familiar faces from both the past and present, spiraling out of control.