Unknown mystery lies in the past that's soon to be unlocked. Earie Cale sees her life meaningless as she sees herself as a unknown mystery. She tries to find herself until she's able to unlock them one by one, the hidden truth about her past.. But the unexpected return, end her life back to the unknown history made her converge to someone who's vicious as a demon like a antagonist person in a tale. But that someone made her fall inlove, but also the one who killed her love.. Will her love be able to survive?