Lee Sungmin worked as a interior designer at SJ Designs Inc, and she was asked by her boss, Heechul, to design the interior of a new extension block of an orphanage, Joy Sanctuary. Though the job was not difficult to complete, the owner of the orphanage, who was also the architect of the building, KH Cho, was a difficult man and fussy about the designing work. Will the two of them be at loggerheads?