Two souls more alike then they appear come together in a contract formed of sin.
Valerie Knight, an elite exorcist with a tragic past but promising future, finds herself where no exorcist should; contracted to, not one demon, but two. Sebastian and Ciel find themselves with perhaps the most interesting contractor they could have stumbled across; an exorcist with a thirst for revenge. The trio never meant to meet, but thrust together by a force more powerful than fate itself the three strive towards a very similar goal. Everything seems to be repeating, but will this end be different than the last? Or will the past find a way of repeating itself once more?