Taehyun is a guardian angel, frequently sent down to earth on missions to save people and guide them to the afterlife. But his work is often disrupted by a playful devil who taunts with his assigned human and tried to lure them to the dark side.

Frustrated and fed up with your behaviour, he tries to find ways to get rid of you, but to no avail it doesn't work. Will this childish fight between good and evil go on for eons? Or will he finally find a way to put you in your place..