A girl has a special gift that allows her to be a great use, but also treated differently. The Requiem of Evanescence society has kept this a secret away from the public to avoid chaos among the people. The girl, Astrally, though hates it, allows herself to be used as a tool for top secret cases. One day, when Astrally is put on the case for a mysterious chain of deaths occurring, she finds a black haired guy who she believes to be involved in it and follows him. However, as she unravels the guy's past, she discovers that he isn't just a part in the case, but something more.
A guy hides from the light, trying to conceal his dark past. But someone is stalking him, attacking with his men - someone from his past. While fighting some men, codenamed Sen is found by a brown eyed girl. Noticing danger, Sen is unable to make her leave, so eventually letting her follow since she appears to be harmless. But little does Sen know that she will bring out the very thing he is running from.
As these two narrators tell their own separate story, they find that their fates have been intertwined and there's no going back.