A group of college students, seeking thrill and adventure, decides to explore the abandoned St. Francis Boarding School, formerly a convent, rumored to be haunted after a horrific massacre occurred there decades ago. Among them are Clorissa, a young woman with a mysterious past linked to the building, and her friend Mo, who is eager to document the adventure with his video camera. As they break into the eerie ruins one night, they are joined by other unwitting visitors with their own motives. Once inside, the students dismiss the place's legendary dark history and set about exploring its decaying halls and cloisters, attempting to frighten each other for fun.

However, their light-hearted encounter quickly turns sinister when they begin to experience paranormal events, encountering terrifying apparitions that reflect the convent's dark and violent history. Old secrets unravel as they delve deeper into the shadows, and it becomes clear that they are not alone—the spirits of the past hunger for their souls. Revelations about Clorissa's connection to the convent's bloody past emerge, weaving a tale of vengeance and demonic forces that defy belief. As they struggle to escape the malevolent entities within, the group must confront literal and metaphysical demons while uncovering the truth behind what transpired decades ago, knowing time is running out before they become part of the convent’s sinister legend forever.