In the original Asian horror film: Ji-won is a bright young student, but an event from her past has left her with no memory. Unsure of her own identity, she also has no recollection of her friends or anything about her life prior to the incident. But when old friends mysteriously start dying one by one, she begins to investigate and piece together fragments of her past. She discovers she was once friends with three other girls, and together they formed an impenetrable alliance. As terrifying visions haunt her waking hours and more friends continue to die, Ji-won draws closer to discovering the mystery that connects past and present, but sometimes ignorance really is bliss.