From the same studio that brought you Murim Login

A long time ago, there was an old serpent (Imugi), who was about to ascend to the sky and become a dragon. However, the serpent (Imugi), who fell to the ground without ascending to heaven, spread his scales all over the world just before he died as revenge. Any living life touched by this scale turned into a demon. In the era of chaos in which monsters appear, there was a hermit who came down from heaven to save humans... Here comes hermit Harang, the prodigy!