In the year of 4017 angels and demons are still at war. A stereotypical war between the “good” and the “bad”. All demons and angels are trained at a young age and are required to fight in the war. Angels often capture demons of a high class as hostages and vice versa.  The angels are separated into 7 different levels. Level 1 being the weakest and level 7 being the strongest. Each angel has a different job depending on their level that would potentially help the angels win the war.This is also the same case with the demons, however they are distinguished by different classes.

Taehyung is an angel who goes on a mission to capture one of the strongest demons in the world, Jungkook. However, as Taehyun gets to know him better, things soon change. Jungkook reminds Taehyung of his past and he soon forgets his main goal is to capture Jungkook for the sake of the war.