At the age of two, Mun went blind. After eighteen years in darkness, she is given the chance of a risky corneal transplant operation. When the bandages are taken off, Mun's eyes respond to the light around her and it appears that the surgery has been successful. However, when Mun experiences a series of inexplicable and chilling encounters with mysterious strangers, she fears that her newly restored eyesight has brought a different kind of darkness into her life.