Piecing together memories from her teen years at an elite English boarding school, Josephine gradually exposes a violent secret explaining why the once-prestigious institution abruptly closed in disgrace.

The girls of St John the Divine, an elite English boarding school, were notorious for harassing teachers, chasing boys, and chain-smoking cigarettes. They were fiercely loyal, sharp-tongued, and cuttingly humorous in the way that only teenage girls can be. For Josephine, now in her 30s, the years at St John were a lifetime ago. She hasn't spoken to another Divine in fifteen years, not since the day the school shuttered its doors in disgrace. Yet now Josephine inexplicably finds herself returning to her old stomping grounds. The visit provokes blurry recollections of those doomed final weeks that rocked the community. Ruminating on the past, Josephine becomes obsessed with her teenage identity and the forgotten girls of her one-time orbit. With each memory that resurfaces, she circles closer to the violent secret at the heart of the school's scandal. But the more Josephine recalls, the further her life unravels, derailing not just her marriage and career, but her entire sense of self.