When given the chance to reunite with her deceased father, college sophomore Maria joins a paranormal academic group led by Louis. However, their scientific venture unearths an ancient ritual in which the group is doomed to take part.

When a Catholic youth ministry is invited to spend the night in a vacant Mexican church, they're suddenly trapped by the ghostly apparition of a vengeful nun. Now their only hope is to break the curse before she claims them all, one deadly sin at a time.