Mild-mannered Sowol is a business owner like any other -- only his laundry service, Yeon, services demons! Housed in the strange, mixed-use Trinity Residential Complex where demons and humans live side-by-side, Yeon is frequented by deadly demons and annoying customers alike. With a new part-time hire to train and mysterious new tenants moving in, Sowol’s got more than his share of dirty laundry to handle.