From building owner to homeless, Hari Yoo's life takes a drastic turn when her first love, Eunho, shows up with a transfer notice for her luxurious "Tiffany Building." In exchange for a roof over her head, Hari agrees to become his housekeeper. But as she struggles with her new job and Eunho's rude behavior, old feelings resurface. Can she win back her building and Eunho's heart, or will the contract clause prohibiting employee seduction be her downfall?