Uncomfortable around people and hiding from his past mistakes, Lee Seoha moves into his grandma's house in the hopes of a bit of peace and quiet. Little does he know, his grandma has plans to take on a tenant - and not just any tenant, but a half-bird man named Shane who pays in raw gemstones and claims to have known Seoha in a past life! Whether friend or foe, this feathered fellow claims that Seoha's real name is Hearth, and that he needs to serve him for three lifetimes in order to demonstrate his virtue. Shane claims that this is the only way for Seoha - fine, Hearth to regain his position in the heavens. The thing is, while the wings may be undeniable, there's still no proof that Shane isn't just a bird-brained lunatic. So why does he seem so familiar...?