Hyun Soo, a loner high school student who lost his entire family in a terrible accident, moves to an old apartment complex called Green Home. Driven by despair, he gradually realizes the secret of the Green home. The fact that a monster trying to drive humanity out of various forms of distorted human desires surrounds the Green home, including himself, and that the residents of Green Homes are trapped in them. ~~Adapted from a webtoon of the same name by Kim Kan Bi and Hwang Young Chan.