An urban youth who is constantly troubled by nightmares, by chance, met a beautiful girl who is an exorcist. So far, he has embarked on a dangerous road to exorcising spirits. Eye, who is the master of the spirit world? What kind of love-hate entanglement will arise between the beautiful and pure girl, the charming and stunning demon spirit and the protagonist, repeated nightmares, twice-altered memories, countless strange mysteries, what? Is the truth behind all this? How will the seven mysterious doomsday keys determine the fate of mankind?