For the empress's birthday, she receives gifts from all of the Houses. The House of Embroidery is to give her a gown embroidered with special peacock feather threads. Jealous that Wei Ying Luo was chosen to embroider the gown, someone steals the threads and destroys the gown. Though able to salvage the gown, Wei Ying Luo looks for another embroidery thread to use in lieu of the missing peacock feather thread. (Source: frankly at MyDramaList)