Kurt and Chloe are a free-spirited couple that invite their closest friends to Kurt's family's vacation house in rural New Hampshire for their wedding. Among the guests are Mia's lifelong friends - Beth, a talented but aimless aspiring writer; Mia, a recently divorced single mom who'd rather not be at a wedding; and Joe, Mia's best friend, who is recovering from the fallout of a bad breakup. Over the course of the weekend leading up to Chloe and Kurt's nuptials, wine is poured (and other substances imbibed) old friendships are tested, and new relationships begin.

On the night of her wedding, Brooke Porter finds herself pursued by a vicious psychopath, only to find her night grow worse from there.