This comedy follows a story about three friends, Chiho, Dongwoo, and Gyungjae. Each of them has just turned 20 years old and the world is their oyster. With new opportunities, they can do what they want, love who they want, and even, cause a little havoc here and there.

The Sanguiwon are responsible for the attire worn by royalty. Dol-Seok (Han Suk-Kyu) is the best master artisan in charge of royal attire. He views set rules as paramount to his job. Kong-Jin (Ko Soo) is a genius like designer, born with dexterity and an excellent sense. He was brought to the palace by nobleman Pan-Soo (Ma Dong-Seok) who first spotted his talent. The King (Yoo Yeon-Seok) and Queen (Park Shin-Hye) then become embroiled in a critical case because of the royal attire made by Dol-Seok and Kong-Jin.