At a remote Catholic boarding school, students Kat and Rose are left behind during the winter break due to a miscommunication with their parents. While Rose struggles with her own personal dilemma, Kat becomes increasingly troubled by dark premonitions and unsettling occurrences around the school. Simultaneously, a mysterious woman named Joan is making her way towards the school, seeming to navigate a personal journey filled with its own haunting past.

As the chilling atmosphere thickens, the narrative skillfully intertwines the fates of these three young women through eerie and unnerving events that gradually unravel deeper, sinister undertones. The isolation and suspense build incrementally, culminating in a disturbing alignment of their stories. Each character's path challenges perceptions of reality, forging an enigmatic connection that leaves a lasting impression tinged with foreboding and dread.