After the death of his wife, Nayeon, Sungkyu's life becomes hell. 2 years after her death he attempts suiciding, but fails and find himself face to face with Woohyun, a former classmate whose prank introduced Sungkyu to Nayeon in the first place. Soon enough the two find themselves in a war against fallen angels, where Sungkyu takes on the form of a monster in order to seal them in hell. At the end, despite beginning his life anew with Mina (former classmate as well), Sungkyu is forced to dea