Before Lee Soo (Seo Ji-Hoon) became a king he was an ordinary blacksmith in the countryside. His life suddenly changed at the age of 23. This was when Lee Soo became the King of Joseon. Meanwhile Lee Soo's first love is Gae-Ddong (Kong Seung-Yeon). He loved her before he took the throne. King Lee Soo wants to marry Gae-Ddong but because of her humble background it is virtually impossible. To marry Gae-Ddong Lee Soo hires the Flower Crew Matchmaking Agency. The agency consists of 3 handsome men: Ma Hoon (Kim Min-Jae) Do Joon (Byeon Woo-Seok) and Ko Young-Soo (Park Ji-Hoon) and they are the best matchmaking agency in Joseon. King Lee Soo asks the Flower Crew to make Gae-Ddong a noble woman.