Having been blind since the age of two, twenty-year-old Mun decides to undergo a risky corneal transplant operation. When the bandages come off, the operation seems to have been successful, but Mun begins to experience unnerving visions of mysterious strangers and it soon transpires that the face she is seeing in the mirror is not her own. Desperate to escape from this nightmare, Mun sets out to discover the identity of the person through whose eyes she is now viewing the world.