After her board exams are over, teenager Sonali, known as Li to her friends, meets a tall, dark and mysterious stranger called Omi Daan on Facebook. What begins as an idle attraction soon takes over her waking hours, and her dreams as she, and through her, her friends Jo and Neel, get sucked inexorably into a world of darkness, danger and death. So who is Omi Daan? Is he real, or is he a Facebook Phantom?