Lin Que inherits a dilapidated apartment building and becomes bound to a landlord management system. Starting with rundown rental rooms costing just 200 yuan a month, he turns everything from clotheslines, hot water, kitchens, and gaming rooms to access cards and bathrooms into paid services with clearly posted prices. Sharp-tongued and stingy, he keeps track of every penny, but he delivers what he promises and stands up for his tenants. He helps a group of down-and-out renters find jobs, start livestreaming, and rebuild their lives. The shabbier Happiness Apartments becomes, the more popular it gets, and amid all the hilarious chaos, the unscrupulous landlord becomes a safe haven for young people.