After a personal tragedy, nurse Shoo is sent to a remote village to care for a woman with agoraphobia. The woman fears her neighbors as much as she fears the "Na Sídhe," evil beings who she claims kidnapped her decades ago. As a strangely deep connection develops between the two women, Shoo becomes increasingly consumed by the old woman's paranoia, rituals, and superstitions, until she is finally forced to confront the horrors of her own past.