Cecilia and Emma were tween-age BFFs who were going to grow old together and never let anything come between them. That is, until Emma’s new friend Alex did just that. Twelve years later, Cecilia is a successful social media influencer living the dream of an independent, modern millennial woman... until she runs into Emma for the first time in over a decade. Emma invites Cecilia away on her hens weekend at a remote cabin in the mountains, where Alex proceeds to make Cecilia’s weekend a living hell.